Year	Percent
1950	13.0316
1955	13.46875
1960	14.26139
1965	15.13797
1970	15.30228
1975	14.95584
1980	13.26535
1985	13.1994
1990	15.80484
1995	15.76763
2000	17.02876
2005	19.09994
2010	20.63459
2015	21.8836
2020	24.33223
2025	27.58402
2030	30.59247
2035	32.16727
2040	33.08268
2045	34.39605
2050	35.43041
2055	36.23259
2060	36.13967
2065	35.81971
2070	35.58418
2075	35.55762
2080	35.76669
2085	36.05704
2090	36.3298
2095	36.56083
2100	36.81145