Year	% of total
1992	42.02468057366362
1993	52.51769379844961
1994	49.135379537953796
1995	66.76569721115537
1996	95.93133928571429
1997	57.41557768924304
1998	53.41065217391304
1999	57.74803149606299
2000	65.33927272727273
2001	65.49432558139534
2002	45.96661971830986
2003	48.499032258064524
2004	47.6141472868217
2005	50.14061224489795
2006	46.14651685393259
2007	38.1368
2008	32.676237623762376
2009	18.565146443514642
2010	15.15289256198347
2011	14.581377952755906
2012	9.07551839464883
2013	0.23208860759493669
2014	0.16407158836689037
2015	0.15407563025210083
2016	0.12305369127516778