Year	Percent
1950	6.32975
1955	6.28504
1960	6.7241
1965	7.53926
1970	8.31248
1975	9.07044
1980	9.67835
1985	10.02956
1990	12.0942
1995	12.68198
2000	13.79544
2005	15.19552
2010	17.02028
2015	19.35742
2020	21.63615
2025	26.36039
2030	30.8958
2035	34.69817
2040	35.72405
2045	36.52909
2050	38.22979
2055	38.95931
2060	39.22664
2065	38.89145
2070	38.43251
2075	38.64799
2080	39.00522
2085	39.3055
2090	39.42765
2095	39.51395
2100	39.65124