Year	Percent
1950	7.71632
1955	8.64981
1960	10.15239
1965	10.19887
1970	10.68718
1975	10.52652
1980	9.90285
1985	9.30636
1990	7.88149
1995	7.47302
2000	7.87077
2005	7.96131
2010	7.08177
2015	6.71034
2020	6.95527
2025	6.5967
2030	6.43493
2035	6.28739
2040	6.10116
2045	5.8991
2050	5.76795
2055	5.6977
2060	5.62519
2065	5.5422
2070	5.43685
2075	5.33152
2080	5.24931
2085	5.19744
2090	5.1561
2095	5.11452
2100	5.06271