Year	%
1999	28.29471
2000	43.05895
2001	10.33859
2002	16.48064
2004	9.970071
2005	16.13584
2006	8.661134
2007	16.33361
2014	8.383483
2015	8.192503
2016	8.243229
2017	5.5167
2018	6.763573
2019	5.950366
2020	7.226698