Year	%
1992	79.44783
1993	78.92074
1994	75.00468
1996	54.24311
1997	43.15132
1998	44.31772
1999	42.13899
2000	43.63533
2001	41.3486
2002	25.73095
2003	22.23613
2004	15.93357
2005	19.83666
2006	11.51856
2007	13.58705
2008	12.15843
2009	12.33983
2010	10.78576
2011	12.40406
2014	16.06497
2015	15.76789
2016	16.82195
2017	13.89561
2018	10.56514
2019	0.901778
2020	0.7916582
2021	0.8949611