Year	Percent
1950	27.55247
1955	32.81074
1960	34.97496
1965	39.99821
1970	44.94485
1975	46.40207
1980	47.2353
1985	55.03682
1990	48.86293
1995	49.08826
2000	42.28393
2005	46.82334
2010	61.4124
2015	60.33616
2020	58.29542
2025	54.69897
2030	49.978
2035	44.56837
2040	40.54103
2045	37.38136
2050	35.04339
2055	33.2911
2060	31.88956
2065	30.70551
2070	29.63731
2075	28.81899
2080	28.14972
2085	27.52413
2090	26.91785
2095	26.30892
2100	25.7034