Year	Percent
1950	27.45417
1955	26.85816
1960	27.0096
1965	25.57856
1970	24.98032
1975	26.67785
1980	27.99335
1985	29.62522
1990	31.12257
1995	33.25367
2000	33.73111
2005	31.30957
2010	33.54679
2015	35.70808
2020	36.68823
2025	34.77343
2030	29.84571
2035	25.15715
2040	22.06817
2045	21.17066
2050	21.87632
2055	21.96129
2060	21.39414
2065	19.94639
2070	18.72906
2075	18.44363
2080	18.9871
2085	19.69043
2090	19.95252
2095	19.65863
2100	19.1462