Year	Percent
1950	12.68073
1955	13.18789
1960	13.54769
1965	13.72512
1970	13.81214
1975	13.84381
1980	13.82658
1985	13.85336
1990	13.53378
1995	13.26731
2000	13.71974
2005	14.57457
2010	15.47449
2015	16.38137
2020	17.28504
2025	18.4893
2030	20.21746
2035	21.78789
2040	22.79513
2045	23.01538
2050	23.31572
2055	24.05427
2060	24.89473
2065	25.78413
2070	26.03292
2075	25.86539
2080	25.80001
2085	25.94498
2090	26.14113
2095	26.17196
2100	25.95417