Year	%
1988	32.33
1989	32.52
1990	32.6
1992	32.43
1995	185.55
1996	17.92
1997	17.94
1998	17.94
1999	22.03
2000	25.22
2001	28.34
2002	26.69
2003	26.21
2005	13.07
2006	13.04
2008	9.79
2009	9.7
2010	9.6
2011	10.2
2013	9.9
2014	11.78
2015	8.59
2016	8.48
2020	11.83
2021	11.68