Year	Percent
1950	12.06512
1955	12.86115
1960	13.85824
1965	14.66612
1970	15.58016
1975	16.32704
1980	16.66353
1985	17.06749
1990	20.37867
1995	19.81664
2000	19.79988
2005	21.2449
2010	23.3089
2015	24.75826
2020	26.18046
2025	27.79275
2030	29.44945
2035	30.05384
2040	30.26478
2045	29.81785
2050	29.99925
2055	30.95098
2060	31.59785
2065	31.96308
2070	32.53239
2075	32.6589
2080	32.97089
2085	33.4948
2090	34.07006
2095	34.59954
2100	35.07568