Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Average |
|
| 1958 | n/a |
n/a |
315.70 |
317.45 |
317.50 |
317.26 |
315.86 |
314.93 |
313.20 |
312.44 |
313.33 |
314.67 |
n/a |
| 1959 | 315.62 |
316.38 |
316.71 |
317.72 |
318.29 |
318.16 |
316.54 |
314.80 |
313.84 |
313.26 |
314.80 |
315.58 |
315.98 |
| 1960 | 316.43 |
316.97 |
317.58 |
319.02 |
320.03 |
319.59 |
318.18 |
315.91 |
314.16 |
313.84 |
315.00 |
316.19 |
316.91 |
| 1961 | 316.93 |
317.70 |
318.54 |
319.48 |
320.58 |
319.77 |
318.57 |
316.79 |
314.80 |
315.38 |
316.10 |
317.01 |
317.64 |
| 1962 | 317.94 |
318.56 |
319.68 |
320.63 |
321.01 |
320.55 |
319.58 |
317.40 |
316.25 |
315.42 |
316.69 |
317.70 |
318.45 |
| 1963 | 318.74 |
319.08 |
319.86 |
321.39 |
322.24 |
321.47 |
319.74 |
317.77 |
316.21 |
315.99 |
317.12 |
318.31 |
318.99 |
| 1964 | 319.57 |
n/a |
n/a |
n/a |
322.24 |
321.89 |
320.44 |
318.70 |
316.70 |
316.79 |
317.79 |
318.71 |
n/a |
| 1965 | 319.44 |
320.44 |
320.89 |
322.13 |
322.16 |
321.87 |
321.39 |
318.80 |
317.81 |
317.30 |
318.87 |
319.42 |
320.04 |
| 1966 | 320.62 |
321.59 |
322.39 |
323.87 |
324.01 |
323.75 |
322.39 |
320.37 |
318.64 |
318.10 |
319.79 |
321.08 |
321.38 |
| 1967 | 322.06 |
322.50 |
323.04 |
324.42 |
325.00 |
324.09 |
322.55 |
320.92 |
319.31 |
319.31 |
320.72 |
321.96 |
322.16 |
| 1968 | 322.57 |
323.15 |
323.89 |
325.02 |
325.57 |
325.36 |
324.14 |
322.03 |
320.41 |
320.25 |
321.31 |
322.84 |
323.05 |
| 1969 | 324.00 |
324.42 |
325.64 |
326.66 |
327.34 |
326.76 |
325.88 |
323.67 |
322.38 |
321.78 |
322.85 |
324.12 |
324.63 |
| 1970 | 325.03 |
325.99 |
326.87 |
328.14 |
328.07 |
327.66 |
326.35 |
324.69 |
323.10 |
323.16 |
323.98 |
325.13 |
325.68 |
| 1971 | 326.17 |
326.68 |
327.18 |
327.78 |
328.92 |
328.57 |
327.34 |
325.46 |
323.36 |
323.57 |
324.80 |
326.01 |
326.32 |
| 1972 | 326.77 |
327.63 |
327.75 |
329.72 |
330.07 |
329.09 |
328.05 |
326.32 |
324.93 |
325.06 |
326.50 |
327.55 |
327.45 |
| 1973 | 328.55 |
329.56 |
330.30 |
331.50 |
332.48 |
332.07 |
330.87 |
329.31 |
327.51 |
327.18 |
328.16 |
328.64 |
329.68 |
| 1974 | 329.35 |
330.71 |
331.48 |
332.65 |
333.09 |
332.25 |
331.18 |
329.40 |
327.43 |
327.37 |
328.46 |
329.57 |
330.25 |
| 1975 | 330.40 |
331.41 |
332.04 |
333.31 |
333.96 |
333.60 |
331.91 |
330.06 |
328.56 |
328.34 |
329.49 |
330.76 |
331.15 |
| 1976 | 331.75 |
332.56 |
333.50 |
334.58 |
334.87 |
334.34 |
333.05 |
330.94 |
329.30 |
328.94 |
330.31 |
331.68 |
332.15 |
| 1977 | 332.93 |
333.42 |
334.70 |
336.07 |
336.74 |
336.27 |
334.93 |
332.75 |
331.59 |
331.16 |
332.40 |
333.85 |
333.90 |
| 1978 | 334.97 |
335.39 |
336.64 |
337.76 |
338.01 |
337.89 |
336.54 |
334.68 |
332.76 |
332.55 |
333.92 |
334.95 |
335.51 |
| 1979 | 336.23 |
336.76 |
337.96 |
338.89 |
339.47 |
339.29 |
337.73 |
336.09 |
333.91 |
333.86 |
335.29 |
336.73 |
336.85 |
| 1980 | 338.01 |
338.36 |
340.08 |
340.77 |
341.46 |
341.17 |
339.56 |
337.60 |
335.88 |
336.02 |
337.10 |
338.21 |
338.69 |
| 1981 | 339.23 |
340.47 |
341.38 |
342.51 |
342.91 |
342.25 |
340.49 |
338.43 |
336.69 |
336.86 |
338.36 |
339.61 |
339.93 |
| 1982 | 340.75 |
341.61 |
342.70 |
343.57 |
344.13 |
343.35 |
342.06 |
339.81 |
337.98 |
337.86 |
339.26 |
340.49 |
341.13 |
| 1983 | 341.37 |
342.52 |
343.10 |
344.94 |
345.75 |
345.32 |
343.99 |
342.39 |
339.86 |
339.99 |
341.15 |
342.99 |
342.78 |
| 1984 | 343.70 |
344.50 |
345.28 |
347.08 |
347.43 |
346.79 |
345.40 |
343.28 |
341.07 |
341.35 |
342.98 |
344.22 |
344.42 |
| 1985 | 344.97 |
346.00 |
347.43 |
348.35 |
348.93 |
348.25 |
346.56 |
344.68 |
343.09 |
342.80 |
344.24 |
345.55 |
345.90 |
| 1986 | 346.30 |
346.96 |
347.86 |
349.55 |
350.21 |
349.54 |
347.94 |
345.90 |
344.85 |
344.17 |
345.66 |
346.90 |
347.15 |
| 1987 | 348.02 |
348.47 |
349.42 |
350.99 |
351.84 |
351.25 |
349.52 |
348.10 |
346.45 |
346.36 |
347.81 |
348.96 |
348.93 |
| 1988 | 350.43 |
351.73 |
352.22 |
353.59 |
354.22 |
353.79 |
352.38 |
350.43 |
348.72 |
348.88 |
350.07 |
351.34 |
351.48 |
| 1989 | 352.76 |
353.07 |
353.68 |
355.42 |
355.67 |
355.13 |
353.90 |
351.67 |
349.80 |
349.99 |
351.29 |
352.52 |
352.91 |
| 1990 | 353.66 |
354.70 |
355.39 |
356.20 |
357.16 |
356.23 |
354.82 |
352.91 |
350.96 |
351.18 |
352.83 |
354.21 |
354.19 |
| 1991 | 354.72 |
355.75 |
357.16 |
358.60 |
359.33 |
358.24 |
356.17 |
354.02 |
352.15 |
352.21 |
353.75 |
354.99 |
355.59 |
| 1992 | 355.98 |
356.72 |
357.81 |
359.15 |
359.66 |
359.25 |
357.02 |
355.00 |
353.01 |
353.31 |
354.16 |
355.40 |
356.37 |
| 1993 | 356.70 |
357.16 |
358.38 |
359.46 |
360.28 |
359.60 |
357.57 |
355.52 |
353.69 |
353.99 |
355.34 |
356.80 |
357.04 |
| 1994 | 358.37 |
358.91 |
359.97 |
361.26 |
361.68 |
360.95 |
359.55 |
357.48 |
355.84 |
355.99 |
357.58 |
359.04 |
358.89 |
| 1995 | 359.97 |
361.00 |
361.64 |
363.45 |
363.79 |
363.26 |
361.90 |
359.46 |
358.05 |
357.76 |
359.56 |
360.70 |
360.88 |
| 1996 | 362.05 |
363.25 |
364.02 |
364.72 |
365.41 |
364.97 |
363.65 |
361.48 |
359.45 |
359.60 |
360.76 |
362.33 |
362.64 |
| 1997 | 363.18 |
364.00 |
364.56 |
366.35 |
366.79 |
365.62 |
364.47 |
362.51 |
360.19 |
360.77 |
362.43 |
364.28 |
363.76 |
| 1998 | 365.33 |
366.15 |
367.31 |
368.61 |
369.30 |
368.87 |
367.64 |
365.77 |
363.90 |
364.23 |
365.46 |
366.97 |
366.63 |
| 1999 | 368.15 |
368.87 |
369.59 |
371.14 |
371.00 |
370.35 |
369.27 |
366.93 |
364.63 |
365.13 |
366.67 |
368.01 |
368.31 |
| 2000 | 369.14 |
369.46 |
370.52 |
371.66 |
371.82 |
371.70 |
370.12 |
368.12 |
366.62 |
366.73 |
368.29 |
369.53 |
369.48 |
| 2001 | 370.28 |
371.50 |
372.12 |
372.87 |
374.02 |
373.30 |
371.62 |
369.55 |
367.96 |
368.09 |
369.68 |
371.24 |
371.02 |
| 2002 | 372.43 |
373.09 |
373.52 |
374.86 |
375.55 |
375.41 |
374.02 |
371.49 |
370.70 |
370.25 |
372.08 |
373.78 |
373.10 |
| 2003 | 374.68 |
375.63 |
376.11 |
377.65 |
378.35 |
378.13 |
376.62 |
374.50 |
372.99 |
373.01 |
374.35 |
375.70 |
375.64 |
| 2004 | 376.79 |
377.37 |
378.41 |
380.52 |
380.63 |
379.57 |
377.79 |
375.86 |
374.07 |
374.24 |
375.86 |
377.47 |
377.38 |
| 2005 | 378.37 |
379.69 |
380.41 |
382.10 |
382.28 |
382.13 |
380.66 |
378.71 |
376.42 |
376.88 |
378.32 |
380.04 |
379.67 |
| 2006 | 381.38 |
382.03 |
382.64 |
384.62 |
384.95 |
384.06 |
382.29 |
380.47 |
378.67 |
379.06 |
380.14 |
381.74 |
381.84 |
| 2007 | 382.45 |
383.68 |
384.23 |
386.26 |
386.39 |
385.87 |
384.39 |
381.78 |
380.73 |
380.81 |
382.33 |
383.69 |
383.55 |
| 2008 | 385.07 |
385.72 |
385.85 |
386.71 |
388.45 |
387.64 |
386.10 |
383.95 |
382.91 |
382.73 |
383.96 |
385.02 |
385.34 |