Year	Percent
1950	15.19749
1955	15.78843
1960	16.42479
1965	16.88247
1970	17.29003
1975	17.54934
1980	17.27217
1985	16.76955
1990	19.38992
1995	19.25774
2000	19.34039
2005	20.44992
2010	21.65609
2015	23.65808
2020	25.933
2025	28.67781
2030	31.08724
2035	32.7119
2040	33.87889
2045	34.70701
2050	35.13015
2055	35.51874
2060	35.66318
2065	35.72021
2070	35.8824
2075	36.07329
2080	36.31113
2085	36.62248
2090	37.00807
2095	37.44034
2100	37.89864