Year	Percent
1950	27.40271
1955	27.06401
1960	26.4255
1965	35.75305
1970	41.2524
1975	48.24417
1980	51.88146
1985	47.42461
1990	42.52941
1995	46.39667
2000	47.02695
2005	54.69689
2010	59.59268
2015	53.00008
2020	49.00618
2025	46.28348
2030	43.96774
2035	42.07014
2040	38.90374
2045	35.84759
2050	33.23315
2055	31.24466
2060	30.33404
2065	29.63588
2070	28.82968
2075	27.96321
2080	27.14695
2085	26.50675
2090	26.02532
2095	25.59743
2100	25.13293