
| 2024 | 17.85 | 5.99 | 224.3 | 297.8% |
| 2023 | 17.19 | 5.98 | 226.1 | 287.4% |
| 2022 | 17.82 | 6.05 | 230.8 | 294.7% |
| 2021 | 17.68 | 5.76 | 222.1 | 306.7% |
| 2020 | 18.4 | 5.65 | 219.3 | 326% |
| 2019 | 18.67 | 6.06 | 237.7 | 308.2% |
| 2018 | 17.16 | 5.8 | 230.8 | 295.9% |
| 2017 | 16.66 | 5.67 | 229.4 | 293.6% |
| 2016 | 15.9 | 5.67 | 233.1 | 280.3% |
| 2015 | 15.48 | 5.48 | 228.7 | 282.6% |
| 2014 | 14.88 | 5.44 | 230.4 | 273.7% |
| 2013 | 13.99 | 5.53 | 237.9 | 253.1% |
| 2012 | 12.98 | 5.56 | 243.5 | 233.3% |
| 2011 | 12.62 | 5.48 | 243.9 | 230.2% |
| 2010 | 13.1 | 5.43 | 245.3 | 241.2% |
| 2009 | 11.73 | 5.41 | 248.2 | 216.9% |
| 2008 | 11.36 | 5.28 | 247.1 | 215.1% |
| 2007 | 11.26 | 5.27 | 251.5 | 213.7% |
| 2006 | 10.73 | 5.11 | 248.2 | 209.8% |
| 2005 | 10.65 | 5.05 | 248.7 | 211% |
| 2004 | 10.05 | 4.96 | 247.3 | 202.7% |
| 2003 | 9.98 | 4.79 | 241.8 | 208.3% |
| 2002 | 10.23 | 4.76 | 243.1 | 214.7% |
| 2001 | 9.98 | 4.6 | 237.6 | 217% |
| 2000 | 9.54 | 4.56 | 238.5 | 209.2% |
| 1999 | 8.72 | 4.52 | 239.2 | 192.8% |
| 1998 | 8.63 | 4.41 | 235.8 | 195.7% |
| 1997 | 8.2 | 4.24 | 228.9 | 193.6% |
| 1996 | 7.75 | 4.13 | 225.7 | 187.7% |
| 1995 | 7.57 | 3.94 | 217.8 | 192.2% |
| 1994 | 7.14 | 3.81 | 213 | 187.2% |
| 1993 | 7.03 | 3.74 | 211.3 | 187.9% |
| 1992 | 7.04 | 3.66 | 208.5 | 192.3% |
| 1991 | 6.81 | 3.58 | 206.2 | 190.2% |
| 1990 | 6.5 | 3.62 | 211.3 | 179.7% |
| 1989 | 5.93 | 3.72 | 220.5 | 159.4% |
| 1988 | 5.72 | 3.51 | 211.4 | 163.1% |
| 1987 | 6.09 | 3.42 | 209.3 | 178.3% |
| 1986 | 5.51 | 3.24 | 201.5 | 170.3% |
| 1985 | 5.25 | 3.19 | 201.7 | 164.4% |
| 1984 | 4.87 | 3.07 | 196.2 | 159% |
| 1983 | 3.53 | 3.02 | 196 | 116.9% |
| 1982 | 3.21 | 3.16 | 207.8 | 101.6% |
| 1981 | 3.14 | 3.01 | 201.2 | 104.3% |
| 1980 | 2.75 | 2.95 | 200.6 | 93.2% |