Year	Percent
1950	19.97565
1955	18.60428
1960	17.03143
1965	16.38196
1970	15.62417
1975	14.87584
1980	14.43216
1985	13.74947
1990	11.91449
1995	15.1111
2000	18.13414
2005	21.90523
2010	25.10872
2015	28.46748
2020	28.51598
2025	28.49817
2030	28.08497
2035	26.87391
2040	24.76441
2045	22.52855
2050	22.04895
2055	23.48383
2060	25.46493
2065	26.72474
2070	26.49391
2075	25.10368
2080	24.38171
2085	24.55827
2090	24.91117
2095	24.85497
2100	24.33238