Year	Percent
1950	17.7923
1955	18.26479
1960	16.90247
1965	14.5474
1970	13.1682
1975	13.48349
1980	13.17349
1985	11.96624
1990	11.10387
1995	11.06482
2000	11.63528
2005	14.37587
2010	16.69752
2015	17.35895
2020	18.09358
2025	19.1428
2030	21.5365
2035	24.66541
2040	26.98322
2045	27.93316
2050	27.72914
2055	26.91609
2060	26.39876
2065	26.146
2070	25.87642
2075	25.55503
2080	25.00457
2085	24.42761
2090	23.9699
2095	23.64301
2100	23.38859