
| 2024 | 0.1 | 0.6 | 114.6 | 16.4% |
| 2023 | 0.1 | 0.6 | 115.5 | 16.3% |
| 2022 | 0.11 | 0.61 | 118.6 | 17.9% |
| 2021 | 0.11 | 0.58 | 115.7 | 18.4% |
| 2020 | 0.13 | 0.56 | 112.4 | 23.2% |
| 2019 | 0.14 | 0.59 | 120.2 | 24.3% |
| 2018 | 0.17 | 0.61 | 125 | 27.1% |
| 2017 | 0.16 | 0.58 | 120.3 | 28.2% |
| 2016 | 0.14 | 0.58 | 121.1 | 24.5% |
| 2015 | 0.04 | 0.54 | 115.8 | 6.6% |
| 2014 | 0.03 | 0.54 | 115.2 | 6% |
| 2013 | 0.03 | 0.54 | 117.6 | 5.5% |
| 2012 | 0.03 | 0.55 | 118.9 | 5.4% |
| 2011 | 0.03 | 0.56 | 121.8 | 5.4% |
| 2010 | 0.03 | 0.61 | 134.3 | 4.5% |
| 2009 | 0.03 | 0.59 | 130.2 | 5.5% |
| 2008 | 0.03 | 0.66 | 147.1 | 4.7% |
| 2007 | 0.03 | 0.66 | 150.9 | 4.2% |
| 2006 | 0.03 | 0.67 | 157.7 | 4.1% |
| 2005 | 0.03 | 0.65 | 157.4 | 4.2% |
| 2004 | 0.04 | 0.63 | 155 | 5.7% |
| 2003 | 0.03 | 0.61 | 151.7 | 4.8% |
| 2002 | 0.03 | 0.61 | 155.2 | 5.7% |
| 2001 | 0.03 | 0.62 | 159.3 | 5.5% |
| 2000 | 0.05 | 0.59 | 155.4 | 8.2% |
| 1999 | 0.05 | 0.55 | 146.6 | 9.6% |
| 1998 | 0.07 | 0.51 | 137.6 | 13% |
| 1997 | 0.09 | 0.47 | 129.2 | 18.4% |
| 1996 | 0.1 | 0.45 | 123.3 | 21.9% |
| 1995 | 0.1 | 0.42 | 116 | 24.3% |
| 1994 | 0.1 | 0.41 | 113.5 | 24.5% |
| 1993 | 0.1 | 0.39 | 109.4 | 25% |
| 1992 | 0.09 | 0.37 | 105.1 | 23.1% |
| 1991 | 0.09 | 0.38 | 106.3 | 23.3% |
| 1990 | 0.09 | 0.36 | 103 | 23.7% |
| 1989 | 0.08 | 0.34 | 97.17 | 24.7% |
| 1988 | 0.08 | 0.32 | 91.4 | 23.5% |
| 1987 | 0.06 | 0.33 | 93.47 | 19% |
| 1986 | 0.06 | 0.33 | 93.13 | 19.4% |
| 1985 | 0.09 | 0.31 | 86.4 | 30.1% |
| 1984 | 0.09 | 0.3 | 85.14 | 28.9% |
| 1983 | 0.08 | 0.29 | 83.91 | 28.3% |
| 1982 | 0.08 | 0.3 | 87.75 | 25.2% |
| 1981 | 0.05 | 0.31 | 89.1 | 17.6% |
| 1980 | 0.04 | 0.32 | 92.92 | 11.6% |