Year	Percent
1950	28.04914
1955	29.12592
1960	32.20366
1965	30.90939
1970	28.33746
1975	27.23251
1980	27.38235
1985	28.32576
1990	28.5918
1995	28.59308
2000	27.30585
2005	25.94673
2010	25.25223
2015	23.70765
2020	23.24474
2025	22.14505
2030	20.75969
2035	19.52156
2040	19.59567
2045	20.78429
2050	21.51921
2055	21.29006
2060	20.79659
2065	20.36282
2070	20.4479
2075	21.03448
2080	21.59013
2085	21.6609
2090	21.29662
2095	20.85292
2100	20.66164