Year	Percent
1950	8.11122
1955	7.44137
1960	6.82472
1965	6.56142
1970	6.75018
1975	7.1032
1980	7.69275
1985	8.01441
1990	9.01616
1995	9.76411
2000	10.5991
2005	11.47138
2010	13.17829
2015	16.14627
2020	18.54096
2025	22.03221
2030	26.61187
2035	30.29245
2040	32.02911
2045	33.81034
2050	37.19085
2055	38.34366
2060	37.96872
2065	37.44721
2070	37.28119
2075	37.57612
2080	37.73853
2085	37.62145
2090	37.46817
2095	37.48848
2100	37.69441