Year | Average Age |
1981 | 13.35 years |
1982 | 2.77 years |
1983 | 3.77 years |
1984 |
|
1985 |
|
1986 |
|
1987 | 5.95 years |
1988 |
|
1989 |
|
1990 | 6.5 years |
1991 | 6.41 years |
1992 | 7.41 years |
1993 | 4.8 years |
1994 | 5.8 years |
1995 | 5.23 years |
1996 | 4.34 years |
1997 | 4.33 years |
1998 | 5.33 years |
1999 | 4.83 years |
2000 | 4.38 years |
2001 | 5.38 years |
2002 | 6.38 years |
2003 | 7.38 years |
2004 | 8.38 years |
2005 | 6.85 years |
2006 | 5.77 years |
2007 | 6.77 years |
2008 | 7.59 years |
2009 | 8.59 years |
2010 | 6.78 years |
2011 | 3.96 years |
2012 | 4.94 years |
2013 | 5.96 years |
2014 | 6.98 years |
