Year	% of total
1992	38.58238591916558
1993	34.893352713178295
1994	21.663135313531352
1995	26.73549800796813
1996	28.15732142857143
1997	25.128446215139444
1998	35.07565217391304
1999	39.55740157480315
2000	33.169681818181814
2001	36.328883720930236
2002	36.153521126760566
2003	38.359861751152074
2004	41.78674418604651
2005	37.41836734693877
2006	41.61426966292135
2007	46.82476923076923
2008	48.65128712871287
2009	66.89589958158996
2010	69.70330578512396
2011	57.31492125984252
2012	61.56635451505017
2013	58.25424050632911
2014	57.3430201342282
2015	53.233130252100835
2016	40.177030201342276