Year	Percent
1950	15.52732
1955	16.36456
1960	17.07062
1965	17.78052
1970	18.50712
1975	19.19984
1980	19.11524
1985	19.22689
1990	23.56455
1995	23.17395
2000	22.94484
2005	23.15103
2010	24.2104
2015	24.92988
2020	26.10593
2025	27.94418
2030	29.65737
2035	30.6065
2040	31.24516
2045	32.05143
2050	32.82792
2055	33.26571
2060	33.33878
2065	33.22894
2070	33.67347
2075	34.27526
2080	34.86501
2085	35.38584
2090	35.81631
2095	36.25211
2100	36.79343