Year	Percent
1950	14.47736
1955	14.86051
1960	15.61445
1965	16.44709
1970	16.98646
1975	17.0796
1980	15.77025
1985	16.52427
1990	20.59429
1995	21.3989
2000	21.98928
2005	22.11429
2010	23.21565
2015	24.02959
2020	25.53695
2025	27.49757
2030	29.17953
2035	30.42624
2040	31.30257
2045	31.98852
2050	32.44197
2055	32.76883
2060	32.69108
2065	32.65882
2070	32.99896
2075	33.41502
2080	33.88804
2085	34.29861
2090	34.66515
2095	35.03455
2100	35.4769