
| 2024 | 26.95 | 11.87 | 349.6 | 226.9% |
| 2023 | 27.96 | 11.7 | 351.9 | 238.8% |
| 2022 | 29.99 | 11.59 | 360.3 | 258.6% |
| 2021 | 26.76 | 11.01 | 351.4 | 243% |
| 2020 | 27.03 | 10.76 | 347.2 | 251.2% |
| 2019 | 28.29 | 11.08 | 363.4 | 255.4% |
| 2018 | 29.63 | 9.6 | 316.2 | 308.7% |
| 2017 | 28.89 | 9.69 | 314.7 | 298.2% |
| 2016 | 29.16 | 12.27 | 399.6 | 237.6% |
| 2015 | 28.15 | 9.86 | 328.9 | 285.5% |
| 2014 | 27.17 | 11.2 | 386.4 | 242.5% |
| 2013 | 26.97 | 10.77 | 384.2 | 250.5% |
| 2012 | 27.42 | 10.48 | 387.4 | 261.5% |
| 2011 | 26.2 | 10.63 | 407 | 246.6% |
| 2010 | 23.33 | 9.88 | 392.8 | 236.2% |
| 2009 | 23.78 | 8.01 | 330.8 | 296.8% |
| 2008 | 26.25 | 8.18 | 351.2 | 321% |
| 2007 | 24.17 | 7.63 | 341.3 | 316.7% |
| 2006 | 25.14 | 6.94 | 323.5 | 362.2% |
| 2005 | 25.39 | 6.67 | 324.3 | 380.8% |
| 2004 | 24.08 | 6.29 | 319.9 | 382.6% |
| 2003 | 23.54 | 5.76 | 306.6 | 408.7% |
| 2002 | 19.72 | 5.51 | 307.6 | 358% |
| 2001 | 20.19 | 5.3 | 310.8 | 381.3% |
| 2000 | 20.72 | 5.1 | 315.3 | 406.2% |
| 1999 | 19.45 | 4.86 | 314 | 400.3% |
| 1998 | 20.78 | 4.53 | 303.8 | 458.3% |
| 1997 | 20.66 | 4.36 | 303 | 474.3% |
| 1996 | 20.12 | 4.11 | 296.8 | 490.2% |
| 1995 | 19.99 | 3.82 | 287.3 | 523.6% |
| 1994 | 19.91 | 3.88 | 304 | 513.8% |
| 1993 | 19.93 | 3.78 | 309.2 | 527.7% |
| 1992 | 20.32 | 3.68 | 315.2 | 551.7% |
| 1991 | 20.06 | 3.49 | 312.9 | 574.4% |
| 1990 | 15.78 | 3.34 | 314.2 | 472.1% |
| 1989 | 12.29 | 3.12 | 308.1 | 393.8% |
| 1988 | 12.4 | 3.18 | 330.5 | 389.5% |
| 1987 | 10.24 | 3.07 | 335.8 | 333.8% |
| 1986 | 11.84 | 3.01 | 348.7 | 393.5% |
| 1985 | 8.25 | 2.75 | 337.6 | 299.7% |
| 1984 | 10.81 | 2.47 | 320.4 | 438.5% |
| 1983 | 0.44 | 2.12 | 292.6 | 20.6% |
| 1982 | 0.45 | 1.99 | 290.9 | 22.7% |
| 1981 | 0.59 | 2.02 | 314.5 | 29.2% |
| 1980 | 0.35 | 1.65 | 273.5 | 21.1% |