Year	Percent
1950	14.40799
1955	14.64225
1960	14.05973
1965	12.70608
1970	11.10939
1975	10.1078
1980	10.37532
1985	12.37641
1990	14.79892
1995	16.71487
2000	14.96571
2005	17.55897
2010	17.59166
2015	19.64841
2020	20.30556
2025	24.12575
2030	30.01528
2035	34.58237
2040	35.15095
2045	33.47949
2050	32.85819
2055	31.85532
2060	31.01473
2065	29.97874
2070	27.71089
2075	25.07737
2080	23.02602
2085	22.38389
2090	22.77544
2095	23.37449
2100	23.74269