
| 2024 | 1.07 | 0.63 | 415.9 | 170.6% |
| 2023 | 1.1 | 0.62 | 414.9 | 176.4% |
| 2022 | 1.15 | 0.64 | 429.3 | 179.1% |
| 2021 | 1.11 | 0.65 | 435.7 | 170.8% |
| 2020 | 1.3 | 0.65 | 436.7 | 200.3% |
| 2019 | 1.48 | 0.72 | 483.9 | 206.2% |
| 2018 | 1.47 | 0.72 | 492.4 | 203.5% |
| 2017 | 1.41 | 0.74 | 510.5 | 191.5% |
| 2016 | 1.53 | 0.88 | 614.3 | 173.2% |
| 2015 | 1.67 | 0.98 | 688.2 | 170% |
| 2014 | 1.78 | 1.01 | 711.7 | 176.4% |
| 2013 | 1.82 | 1.03 | 730.9 | 175.9% |
| 2012 | 1.74 | 0.93 | 663.3 | 186.7% |
| 2011 | 1.8 | 0.97 | 696.7 | 185.6% |
| 2010 | 1.86 | 0.96 | 689.7 | 194.9% |
| 2009 | 1.81 | 0.87 | 634 | 207.3% |
| 2008 | 1.77 | 0.91 | 666.5 | 193.5% |
| 2007 | 1.76 | 0.86 | 626.2 | 206.1% |
| 2006 | 1.72 | 0.85 | 623.8 | 202.5% |
| 2005 | 1.5 | 0.66 | 490.4 | 226.7% |
| 2004 | 1.32 | 0.58 | 432.8 | 227.5% |
| 2003 | 1.31 | 0.62 | 466.5 | 210.4% |
| 2002 | 0.96 | 0.52 | 388.2 | 186.2% |
| 2001 | 0.84 | 0.48 | 363.9 | 174.7% |
| 2000 | 0.81 | 0.44 | 333.5 | 183.7% |
| 1999 | 0.73 | 0.4 | 303.3 | 183.9% |
| 1998 | 0.63 | 0.39 | 295.6 | 162.8% |
| 1997 | 0.63 | 0.39 | 297.8 | 162.7% |
| 1996 | 0.62 | 0.36 | 275.8 | 172.8% |
| 1995 | 0.59 | 0.33 | 251.2 | 180.3% |
| 1994 | 0.57 | 0.31 | 241.6 | 182.2% |
| 1993 | 0.5 | 0.27 | 212.1 | 183.5% |
| 1992 | 0.52 | 0.25 | 195 | 209% |
| 1991 | 0.54 | 0.25 | 200.6 | 211.5% |
| 1990 | 0.52 | 0.23 | 180.5 | 229% |
| 1989 | 0.5 | 0.21 | 170.7 | 234.8% |
| 1988 | 0.49 | 0.2 | 160.9 | 249.6% |
| 1987 | 0.49 | 0.19 | 157 | 256.7% |
| 1986 | 0.53 | 0.21 | 170.8 | 258.2% |
| 1985 | 0.61 | 0.27 | 230.8 | 223.6% |
| 1984 | 0.57 | 0.25 | 214.1 | 228.3% |
| 1983 | 0.13 | 0.19 | 159.5 | 71.8% |
| 1982 | 0.11 | 0.17 | 145.5 | 63.9% |
| 1981 | 0.08 | 0.16 | 143.7 | 52% |
| 1980 | 0.08 | 0.17 | 151.1 | 50.1% |