| 1985 | 4.79% | 2.43% | 19.23 | 0.88 | 0.32 | 3.46 | 0.93 |
| 1986 | 6.08% | 3.02% | 19.47 | 1.12 | 0.40 | 4.38 | 0.95 |
| 1987 | 7.90% | 4.12% | 19.80 | 1.45 | 0.55 | 5.66 | 0.98 |
| 1988 | 8.38% | 4.21% | 19.89 | 1.54 | 0.56 | 5.99 | 1.02 |
| 1989 | 6.83% | 3.47% | 19.61 | 1.25 | 0.46 | 4.91 | 1.04 |
| 1990 | 9.11% | 4.63% | 20.02 | 1.67 | 0.62 | 6.51 | 1.06 |
| 1991 | 8.19% | 4.19% | 19.86 | 1.50 | 0.56 | 5.87 | 1.08 |
| 1992 | 5.90% | 3.00% | 19.44 | 1.08 | 0.40 | 4.25 | 1.09 |
| 1993 | 6.65% | 3.38% | 19.57 | 1.22 | 0.45 | 4.78 | 1.10 |
| 1994 | 7.62% | 3.84% | 19.75 | 1.40 | 0.51 | 5.46 | 1.13 |
| 1995 | 9.63% | 4.79% | 20.12 | 1.77 | 0.64 | 6.86 | 1.15 |
| 1996 | 7.00% | 3.64% | 19.64 | 1.28 | 0.49 | 5.03 | 1.18 |
| 1997 | 9.71% | 5.12% | 20.13 | 1.78 | 0.68 | 6.94 | 1.20 |
| 1998 | 12.05% | 6.20% | 20.56 | 2.21 | 0.83 | 8.54 | 1.24 |
| 1999 | 9.40% | 4.59% | 20.08 | 1.72 | 0.61 | 6.69 | 1.27 |
| 2000 | 8.79% | 4.43% | 19.97 | 1.61 | 0.59 | 6.28 | 1.28 |
| 2001 | 10.84% | 5.55% | 20.34 | 1.99 | 0.74 | 7.71 | 1.31 |
| 2002 | 11.71% | 5.97% | 20.50 | 2.15 | 0.80 | 8.31 | 1.34 |
| 2003 | 11.81% | 6.08% | 20.52 | 2.17 | 0.81 | 8.38 | 1.37 |
| 2004 | 10.89% | 5.64% | 20.35 | 2.00 | 0.75 | 7.75 | 1.40 |
| 2005 | 12.56% | 6.35% | 20.66 | 2.31 | 0.85 | 8.89 | 1.43 |
| 2006 | 11.89% | 6.06% | 20.53 | 2.18 | 0.81 | 8.43 | 1.46 |
| 2007 | 12.16% | 5.99% | 20.58 | 2.23 | 0.80 | 8.60 | 1.49 |
| 2008 | 10.76% | 5.39% | 20.33 | 1.97 | 0.72 | 7.64 | 1.51 |
| 2009 | 11.79% | 6.12% | 20.52 | 2.16 | 0.82 | 8.37 | 1.54 |
| 2010 | 13.25% | 6.75% | 20.78 | 2.43 | 0.90 | 9.36 | 1.57 |
| 2011 | 11.14% | 5.61% | 20.40 | 2.04 | 0.75 | 7.91 | 1.59 |
| 2012 | 11.85% | 6.07% | 20.53 | 2.18 | 0.81 | 8.41 | 1.62 |
| 2013 | 12.38% | 6.33% | 20.62 | 2.27 | 0.84 | 8.77 | 1.66 |
| 2014 | 12.98% | 6.82% | 20.74 | 2.38 | 0.91 | 9.20 | 1.69 |
| 2015 | 15.99% | 8.30% | 21.29 | 2.93 | 1.11 | 11.23 | 1.72 |
| 2016 | 16.94% | 8.78% | 21.46 | 3.11 | 1.17 | 11.87 | 1.76 |
| 2017 | 15.77% | 8.14% | 21.25 | 2.89 | 1.09 | 11.08 | 1.79 |
| 2018 | 14.38% | 7.50% | 20.99 | 2.64 | 1.00 | 10.15 | 1.82 |
| 2019 | 16.13% | 8.41% | 21.31 | 2.96 | 1.12 | 11.33 | 1.84 |