Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann. Ave. |
|
| 1983 | 340.9 | 340.99 | 340.86 | 340.7 | 340.73 | 340.98 | 341.28 | 341.49 | 341.62 | 341.8 | 342.14 | 342.55 | 341.34 |
| 1984 | 342.83 | 342.8 | 342.55 | 342.3 | 342.27 | 342.47 | 342.74 | 342.93 | 343.06 | 343.25 | 343.61 | 344.04 | 342.9 |
| 1985 | 344.33 | 344.3 | 344.07 | 343.8 | 343.74 | 343.91 | 344.16 | 344.34 | 344.45 | 344.63 | 344.99 | 345.42 | 344.35 |
| 1986 | 345.73 | 345.72 | 345.49 | 345.24 | 345.19 | 345.38 | 345.63 | 345.8 | 345.91 | 346.09 | 346.44 | 346.88 | 345.79 |
| 1987 | 347.19 | 347.21 | 347.03 | 346.85 | 346.88 | 347.16 | 347.51 | 347.79 | 348 | 348.27 | 348.7 | 349.18 | 347.65 |
| 1988 | 349.52 | 349.54 | 349.32 | 349.08 | 349.05 | 349.25 | 349.52 | 349.72 | 349.85 | 350.04 | 350.4 | 350.8 | 349.67 |
| 1989 | 351.06 | 350.99 | 350.72 | 350.41 | 350.32 | 350.46 | 350.68 | 350.83 | 350.92 | 351.09 | 351.44 | 351.86 | 350.9 |
| 1990 | 352.16 | 352.15 | 351.93 | 351.69 | 351.66 | 351.86 | 352.13 | 352.32 | 352.44 | 352.61 | 352.95 | 353.36 | 352.27 |
| 1991 | 353.64 | 353.6 | 353.36 | 353.08 | 353.02 | 353.18 | 353.42 | 353.57 | 353.65 | 353.79 | 354.11 | 354.49 | 353.58 |
| 1992 | 354.75 | 354.71 | 354.46 | 354.21 | 354.17 | 354.36 | 354.6 | 354.76 | 354.82 | 354.94 | 355.23 | 355.57 | 354.72 |
| 1993 | 355.78 | 355.68 | 355.4 | 355.09 | 355.02 | 355.2 | 355.47 | 355.67 | 355.81 | 356.01 | 356.38 | 356.8 | 355.69 |
| 1994 | 357.08 | 357.05 | 356.81 | 356.55 | 356.51 | 356.71 | 357 | 357.23 | 357.4 | 357.63 | 358.04 | 358.52 | 357.21 |
| 1995 | 358.86 | 358.9 | 358.72 | 358.51 | 358.51 | 358.73 | 359 | 359.18 | 359.28 | 359.44 | 359.76 | 360.14 | 359.09 |
| 1996 | 360.39 | 360.33 | 360.06 | 359.78 | 359.72 | 359.9 | 360.15 | 360.32 | 360.42 | 360.58 | 360.93 | 361.35 | 360.33 |
| 1997 | 361.63 | 361.62 | 361.4 | 361.16 | 361.15 | 361.39 | 361.7 | 361.95 | 362.14 | 362.41 | 362.86 | 363.39 | 361.9 |
| 1998 | 363.79 | 363.89 | 363.78 | 363.65 | 363.72 | 364.02 | 364.36 | 364.63 | 364.81 | 365.05 | 365.45 | 365.92 | 364.42 |
| 1999 | 366.23 | 366.24 | 366.02 | 365.77 | 365.74 | 365.93 | 366.19 | 366.37 | 366.47 | 366.62 | 366.93 | 367.3 | 366.32 |
| 2000 | 367.53 | 367.43 | 367.11 | 366.78 | 366.68 | 366.82 | 367.05 | 367.22 | 367.33 | 367.5 | 367.85 | 368.27 | 367.3 |
| 2001 | 368.55 | 368.53 | 368.31 | 368.07 | 368.07 | 368.31 | 368.64 | 368.9 | 369.09 | 369.36 | 369.8 | 370.32 | 368.83 |
| 2002 | 370.72 | 370.81 | 370.68 | 370.55 | 370.62 | 370.93 | 371.3 | 371.6 | 371.82 | 372.09 | 372.54 | 373.03 | 371.39 |
| 2003 | 373.39 | 373.43 | 373.24 | 373.03 | 373.01 | 373.22 | 373.49 | 373.68 | 373.79 | 373.98 | 374.34 | 374.77 | 373.61 |
| 2004 | 375.07 | 375.07 | 374.85 | 374.62 | 374.61 | 374.83 | 375.13 | 375.36 | 375.52 | 375.75 | 376.16 | 376.64 | 375.3 |
| 2005 | 376.99 | 377.04 | 376.88 | 376.7 | 376.75 | 377.04 | 377.39 | 377.68 | 377.9 | 378.17 | 378.61 | 379.11 | 377.52 |
| 2006 | 379.47 | 379.51 | 379.32 | 379.1 | 379.07 | 379.27 | 379.53 | 379.71 | 379.82 | 379.99 | 380.33 | 380.74 | 379.66 |