Year	Percent
1950	11.76122
1955	11.29638
1960	10.87858
1965	12.10676
1970	13.37138
1975	13.26702
1980	12.25227
1985	12.51439
1990	16.08024
1995	17.50539
2000	19.20019
2005	21.14443
2010	22.38633
2015	24.52958
2020	26.50219
2025	28.59911
2030	29.88504
2035	31.03049
2040	31.48051
2045	31.77912
2050	32.55647
2055	33.78205
2060	33.81905
2065	32.96511
2070	32.4878
2075	32.69972
2080	33.03925
2085	33.53952
2090	33.85625
2095	33.88944
2100	33.91383