Year	Percent
1950	12.50839
1955	13.45012
1960	14.68995
1965	15.71548
1970	16.85179
1975	17.71914
1980	18.09453
1985	18.53353
1990	22.98926
1995	22.34052
2000	22.08927
2005	23.19939
2010	24.98162
2015	26.27555
2020	27.63392
2025	29.2132
2030	30.77218
2035	31.40509
2040	31.58197
2045	31.06964
2050	31.13285
2055	32.01681
2060	32.61225
2065	32.99548
2070	33.54877
2075	33.69619
2080	34.04649
2085	34.60539
2090	35.18748
2095	35.68661
2100	36.12315