Jan. |
Feb. |
Mar. |
Apr. |
May |
Jun. |
Jul. |
Aug. |
Sep. |
Oct. |
Nov. |
Dec. |
Ann. Ave. |
|
| 1991 | 353.17 | 353.17 | 354.5 | 355.58 | 355.12 | 355.1 | |||||||
| 1992 | 354.84 | 354.35 | 354.12 | 354 | 354.09 | 353.58 | 354.11 | 355.44 | 356.26 | 356.15 | 355.83 | 355.83 | 354.88 |
| 1993 | 355.27 | 354.87 | 354.57 | 354.36 | 354.66 | 355.35 | 355.98 | 355.76 | 355.8 | 356.1 | 356.07 | 357.48 | 355.52 |
| 1994 | 357.79 | 356.08 | 355.61 | 355.64 | 355.36 | 355.74 | 356.28 | 356.73 | 357.1 | 358.4 | 359.38 | 358.67 | 356.9 |
| 1995 | 358.43 | 358.22 | 357.96 | 358.46 | 359.02 | 359.06 | 358.34 | 358.43 | 359.42 | 359.89 | 360.29 | 360.67 | 359.02 |
| 1996 | 361.35 | 361.99 | 361.83 | 361.6 | 360.77 | 359.86 | 360.19 | 360.86 | 360.99 | 360.6 | 360.79 | 361.36 | 361.02 |
| 1997 | 361.09 | 360.87 | 360.6 | 360.93 | 362.65 | 362.16 | 360.46 | 362.1 | 363.87 | 363.68 | 363.49 | 363.96 | 362.16 |
| 1998 | 364.84 | 364.5 | 364.12 | 365.16 | 365.29 | 365.29 | 365.27 | 364.91 | 365.89 | 367.02 | 366.83 | 366.3 | 365.45 |
| 1999 | 365.76 | 365.7 | 365.62 | 364.7 | 364.41 | 365.23 | 365.77 | 366.13 | 366.46 | 366.52 | 366.83 | 366.96 | 365.84 |
| 2000 | 366.72 | 366.2 | 365.96 | 366.16 | 368.2 | 369.92 | 367.9 | 367.05 | 368.66 | 369.1 | 369.09 | 369.84 | 367.9 |
| 2001 | 368.58 | 366.99 | 367.71 | 368.22 | 368.26 | 368.85 | 369.47 | 370.16 | 370.25 | 370.41 | 371.51 | 371.11 | 369.29 |
| 2002 | 370.39 | 370.67 | 370.11 | 369.96 | 370.99 | 371.73 | 371.83 | 371.8 | 371.92 | 372.31 | 372.56 | 372.6 | 371.41 |
| 2003 | 372.64 | 372.75 | 372.47 | 372.06 | 372.62 | 373.06 | 373.12 | 374.29 | 374.39 | 373.66 | 374.03 | 375.1 | 373.35 |
| 2004 | 376.18 | 375.37 | 374.34 | 374.86 | 375.29 | 374.7 | 374.97 | 375.71 | 375.28 | 375.5 | 376.51 | 376.29 | 375.42 |
| 2005 | 375.89 | 376.19 | 376.02 | 376.26 | 377.64 | 378.58 | 378.16 | 377.81 | 377.51 | 377.81 | 378.75 | 378.93 | 377.46 |
| 2006 | 378.88 | 378.75 | 378.59 | 378.27 | 377.69 | 377.95 | 379.05 | 379.53 | 379.23 | 379.28 | 379.89 | 379.92 | 378.92 |