Year	% of total
1992	22.294297101449274
1993	22.923283877349157
1994	26.20085496183206
1995	37.62660869565217
1996	35.081178509532066
1997	29.25866432337434
1998	32.41311774461028
1999	24.03837160751566
2000	28.11104925053533
2001	33.806599496221665
2002	34.23517102615694
2003	25.1245259391771
2004	27.568453237410072
2005	26.70683018867924
2006	27.778214285714288
2007	22.784142194744977
2008	19.043009320905462
2009	9.221745562130177
2010	8.8931968503937
2011	8.373464566929133
2012	8.128638170974154
2013	6.68504264392324
2014	5.324891864057673
2015	5.105949367088607
2016	5.632814432989691