Year	Percent
1950	14.42477
1955	12.53661
1960	11.19435
1965	10.22222
1970	9.70881
1975	9.96314
1980	10.45703
1985	10.84525
1990	11.25756
1995	10.77182
2000	10.63262
2005	11.32798
2010	12.09814
2015	13.10865
2020	14.1913
2025	15.07752
2030	16.34215
2035	18.17874
2040	19.63276
2045	20.5308
2050	21.2064
2055	21.65639
2060	22.31441
2065	23.16926
2070	23.77016
2075	24.06428
2080	24.18936
2085	24.31023
2090	24.47426
2095	24.63017
2100	24.69527