
| 2024 | 1.1 | 0.83 | 518.8 | 131.7% |
| 2023 | 1.1 | 0.83 | 525.8 | 133.7% |
| 2022 | 1.06 | 0.81 | 527.2 | 131.3% |
| 2021 | 1.07 | 0.82 | 543.3 | 131.3% |
| 2020 | 1.05 | 0.78 | 526.5 | 134.6% |
| 2019 | 1.1 | 0.79 | 531.1 | 139% |
| 2018 | 1.03 | 0.72 | 481.9 | 143.4% |
| 2017 | 1.03 | 0.71 | 479.2 | 145.4% |
| 2016 | 1.02 | 0.69 | 484.8 | 146.8% |
| 2015 | 1.02 | 0.69 | 507.2 | 147.4% |
| 2014 | 1.02 | 0.69 | 524.5 | 148.8% |
| 2013 | 0.98 | 0.69 | 552.6 | 141.7% |
| 2012 | 0.89 | 0.62 | 513.6 | 143.1% |
| 2011 | 0.89 | 0.58 | 481.9 | 153.1% |
| 2010 | 0.88 | 0.59 | 484.4 | 149.1% |
| 2009 | 0.87 | 0.58 | 491.2 | 149.6% |
| 2008 | 0.87 | 0.59 | 523.9 | 148% |
| 2007 | 0.85 | 0.56 | 530.3 | 151.2% |
| 2006 | 0.83 | 0.55 | 549.1 | 152% |
| 2005 | 0.81 | 0.51 | 548.8 | 159.2% |
| 2004 | 0.78 | 0.46 | 523.6 | 171.6% |
| 2003 | 0.78 | 0.44 | 542.9 | 176.5% |
| 2002 | 0.76 | 0.42 | 560.4 | 181.1% |
| 2001 | 0.74 | 0.4 | 564.5 | 186.7% |
| 2000 | 0.74 | 0.38 | 570.1 | 192.7% |
| 1999 | 0.72 | 0.36 | 551.1 | 199.7% |
| 1998 | 0.73 | 0.35 | 549.9 | 207.7% |
| 1997 | 0.72 | 0.33 | 536.8 | 213.6% |
| 1996 | 0.66 | 0.28 | 467.1 | 230.8% |
| 1995 | 0.65 | 0.28 | 478.1 | 229.8% |
| 1994 | 0.65 | 0.28 | 489.8 | 228.6% |
| 1993 | 0.35 | 0.29 | 510.5 | 122.9% |
| 1992 | 0.31 | 0.24 | 439.2 | 127.6% |
| 1991 | 0.35 | 0.29 | 539.2 | 123% |
| 1990 | 0.32 | 0.26 | 497.7 | 125% |
| 1989 | 0.3 | 0.23 | 470.7 | 128.6% |
| 1988 | 0.3 | 0.23 | 477.1 | 129.8% |
| 1987 | 0.33 | 0.27 | 574.3 | 125.5% |
| 1986 | 0.3 | 0.22 | 495.2 | 133.7% |
| 1985 | 0.27 | 0.2 | 474 | 134.5% |
| 1984 | 0.24 | 0.17 | 413.4 | 142% |
| 1983 | 0.15 | 0.18 | 441.4 | 82.9% |
| 1982 | 0.14 | 0.17 | 435.2 | 80.8% |
| 1981 | 0.13 | 0.16 | 422.8 | 79.6% |
| 1980 | 0.1 | 0.14 | 381.9 | 76.4% |