Year	Percent
1950	12.71315
1955	13.00135
1960	12.93809
1965	12.71912
1970	12.43668
1975	12.11288
1980	11.84211
1985	11.62869
1990	11.26896
1995	10.64563
2000	9.99993
2005	9.53465
2010	9.68223
2015	10.63387
2020	11.78278
2025	12.77153
2030	13.60168
2035	14.2734
2040	15.02742
2045	15.89504
2050	16.66285
2055	17.35219
2060	17.98174
2065	18.57592
2070	19.21152
2075	19.81682
2080	20.32424
2085	20.75856
2090	21.15755
2095	21.55109
2100	21.91668