Year	Percent
1950	9.03892
1955	7.94202
1960	6.76581
1965	6.09078
1970	5.49993
1975	4.90824
1980	4.11058
1985	3.86462
1990	4.90087
1995	5.07659
2000	5.54527
2005	5.22283
2010	5.28697
2015	5.86898
2020	6.93481
2025	8.02202
2030	9.11231
2035	10.01305
2040	11.02837
2045	12.08871
2050	13.67156
2055	15.08325
2060	15.30664
2065	15.54093
2070	16.05887
2075	17.92256
2080	19.5083
2085	20.59167
2090	21.27119
2095	21.91298
2100	22.81806