Year	Percent
1950	27.84566
1955	29.77841
1960	32.57769
1965	31.97823
1970	31.89304
1975	31.14845
1980	31.07355
1985	32.46484
1990	31.45185
1995	29.11289
2000	28.63779
2005	28.34888
2010	28.25672
2015	27.32618
2020	26.168
2025	24.41607
2030	23.58395
2035	23.4096
2040	22.7399
2045	22.57438
2050	21.70628
2055	21.00383
2060	20.7374
2065	20.81587
2070	20.98442
2075	21.07304
2080	20.99374
2085	20.79353
2090	20.64964
2095	20.6748
2100	20.80254