Year	Percent
1950	14.98391
1955	14.20579
1960	13.66504
1965	13.23073
1970	12.83066
1975	13.13664
1980	11.08355
1985	10.66452
1990	10.74109
1995	12.28941
2000	14.18944
2005	15.55708
2010	15.63079
2015	13.72459
2020	12.49652
2025	13.87833
2030	16.50345
2035	20.57099
2040	24.34093
2045	25.68078
2050	25.57784
2055	24.52733
2060	23.7285
2065	23.96128
2070	25.10208
2075	26.20428
2080	26.35426
2085	25.70198
2090	24.91131
2095	24.66173
2100	25.07118