
| 2024 | 11.8 | 5.02 | 455.1 | 235.1% |
| 2023 | 11.48 | 5.03 | 472.8 | 228.1% |
| 2022 | 11.29 | 4.56 | 445.4 | 247.5% |
| 2021 | 9.82 | 4.31 | 440.2 | 227.8% |
| 2020 | 9.79 | 4.16 | 440.4 | 235.2% |
| 2019 | 10.47 | 4.3 | 458.8 | 243.4% |
| 2018 | 9.51 | 4.1 | 438.8 | 231.8% |
| 2017 | 9.61 | 4.4 | 476.1 | 218.6% |
| 2016 | 9.97 | 4.72 | 522.8 | 211.3% |
| 2015 | 9.73 | 4.7 | 541.9 | 206.9% |
| 2014 | 9.23 | 4.15 | 504.1 | 222.3% |
| 2013 | 9.04 | 4.18 | 533.2 | 216.4% |
| 2012 | 9 | 4 | 533.4 | 225.2% |
| 2011 | 8.54 | 4.04 | 561.5 | 211.3% |
| 2010 | 7.71 | 3.64 | 524.5 | 211.9% |
| 2009 | 7.59 | 3.51 | 523.7 | 216% |
| 2008 | 8.19 | 3.58 | 568.3 | 228.7% |
| 2007 | 8.18 | 3.1 | 551.3 | 263.9% |
| 2006 | 8.33 | 2.82 | 562.7 | 295.4% |
| 2005 | 7.94 | 2.67 | 571.8 | 297.7% |
| 2004 | 7.61 | 2.58 | 583.5 | 294.6% |
| 2003 | 7.35 | 2.44 | 582.7 | 300.7% |
| 2002 | 6.5 | 2.37 | 599.5 | 273.8% |
| 2001 | 6.7 | 2.27 | 609.4 | 295.5% |
| 2000 | 6.8 | 2.09 | 598.3 | 325.2% |
| 1999 | 7 | 1.86 | 570.6 | 375.4% |
| 1998 | 7.49 | 1.84 | 604.5 | 407.7% |
| 1997 | 7.49 | 1.77 | 627.5 | 423.5% |
| 1996 | 7.28 | 1.67 | 642.8 | 435.8% |
| 1995 | 7.06 | 1.6 | 659.1 | 440.1% |
| 1994 | 6.95 | 1.49 | 639.5 | 466.6% |
| 1993 | 6.04 | 1.51 | 679.4 | 400.1% |
| 1992 | 6.41 | 1.61 | 762.9 | 397.3% |
| 1991 | 6.54 | 1.49 | 741.5 | 439.5% |
| 1990 | 5.74 | 1.23 | 646.6 | 467.8% |
| 1989 | 5.38 | 1.27 | 708.5 | 424.2% |
| 1988 | 4.56 | 1.17 | 696.2 | 389.7% |
| 1987 | 4.33 | 1.07 | 679 | 404.8% |
| 1986 | 3.93 | 0.91 | 618.3 | 432.7% |
| 1985 | 3.49 | 0.8 | 581.2 | 435.5% |
| 1984 | 3.31 | 0.59 | 451.1 | 561.3% |
| 1983 | 0.28 | 0.52 | 419.1 | 54.6% |
| 1982 | 0.21 | 0.42 | 360.3 | 49.8% |
| 1981 | 0.24 | 0.44 | 401 | 54.6% |
| 1980 | 0.21 | 0.28 | 270.8 | 76.1% |