Year	Percent
1950	28.13251
1955	28.10215
1960	27.84487
1965	27.44407
1970	26.74094
1975	26.20304
1980	25.75871
1985	24.87698
1990	24.46208
1995	26.2296
2000	31.03685
2005	34.37906
2010	40.2949
2015	41.64943
2020	38.62134
2025	34.84414
2030	31.67602
2035	31.19404
2040	32.1824
2045	31.98517
2050	30.67999
2055	28.12232
2060	25.74635
2065	24.35286
2070	23.87612
2075	23.71836
2080	23.34154
2085	22.60144
2090	21.75861
2095	21.15119
2100	20.91717