Year	Percent
1950	27.40471
1955	30.179
1960	31.3207
1965	34.92456
1970	38.89548
1975	40.10449
1980	42.18389
1985	48.64949
1990	44.17404
1995	44.8382
2000	39.51174
2005	44.43848
2010	57.71478
2015	56.70473
2020	54.28925
2025	50.81137
2030	46.13005
2035	41.46899
2040	38.28189
2045	35.73873
2050	33.81388
2055	32.13353
2060	30.6549
2065	29.41521
2070	28.38542
2075	27.67215
2080	27.11655
2085	26.5635
2090	25.98891
2095	25.4009
2100	24.85067