Year	Percent
1950	26.62338
1955	26.04782
1960	22.67198
1965	22.61617
1970	22.13861
1975	21.86328
1980	23.30294
1985	21.45787
1990	22.58421
1995	23.7978
2000	25.4379
2005	27.21317
2010	26.68553
2015	26.27486
2020	25.23364
2025	24.2988
2030	23.33664
2035	22.31028
2040	22.1727
2045	22.13735
2050	22.36896
2055	22.66477
2060	22.66547
2065	22.42143
2070	22.10235
2075	21.95643
2080	21.9334
2085	21.91335
2090	21.79376
2095	21.56276
2100	21.3146