Year	%
1997	55.1804
1999	55.35007
2000	47.83013
2001	47.70614
2002	45.95636
2003	49.55992
2004	50.98528
2005	52.1564
2006	40.06057
2007	49.69209
2008	52.68445
2009	36.59139
2010	51.99716
2012	37.86812
2013	37.88412
2018	23.72467
2019	26.44248
2020	25.59225
2021	24.53092