| 1st January 1986 – 31st December 2012 | | 150∙4% | | – |
| 1st January 1987 – 31st December 2012 | | 142∙9% | | – |
| 1st January 1988 – 31st December 2012 | | 133∙1% | | – |
| 1st January 1989 – 31st December 2012 | | 120∙6% | | – |
| 1st January 1990 – 31st December 2012 | | 105∙0% | | – |
| 1st January 1991 – 31st December 2012 | | 84∙8% | | – |
| 1st January 1992 – 31st December 2012 | | 77∙6% | | – |
| 1st January 1993 – 31st December 2012 | | 71∙4% | | – |
| 1st January 1994 – 31st December 2012 | | 68∙4% | | – |
| 1st January 1995 – 31st December 2012 | | 64∙7% | | – |
| 1st January 1996 – 31st December 2012 | | 58∙5% | | – |
| 1st January 1997 – 31st December 2012 | | 55∙3% | | – |
| 1st January 1998 – 31st December 2012 | | 49∙9% | | – |
| 1st January 1999 – 31st December 2012 | | 45∙2% | | – |
| 1st January 2000 – 31st December 2012 | | 43∙7% | | – |
| 1st January 2001 – 31st December 2012 | | 39∙1% | | – |
| 1st January 2002 – 31st December 2012 | | 36∙7% | | – |
| 1st January 2003 – 31st December 2012 | | 34∙5% | | – |
| 1st January 2004 – 31st December 2012 | | 30∙8% | | – |
| 1st January 2005 – 31st December 2012 | | 26∙9% | | – |
| 1st January 2006 – 31st December 2012 | | 23∙5% | | – |
| 1st January 2007 – 31st December 2012 | | 19∙2% | | – |
| 1st January 2008 – 31st December 2012 | | 14∙8% | | – |
| 1st January 2009 – 31st December 2012 | | 9∙3% | | 9∙3% |
| 1st January 2010 – 31st December 2012 | | 10∙8% | | 7∙7% |
| 1st January 2011 – 31st December 2012 | | 7∙5% | | 5∙1% |
| 1st January 2012 – 31st December 2012 | | 2∙2% | | 2∙2% |
| (all dates inclusive) | | | |