Year	Percent
1950	27.29368
1955	27.59352
1960	27.03516
1965	25.6564
1970	25.17864
1975	26.05899
1980	27.80351
1985	29.74534
1990	31.08636
1995	31.61854
2000	31.67161
2005	31.61607
2010	31.47282
2015	31.31982
2020	30.87365
2025	30.37121
2030	29.86877
2035	29.26272
2040	28.73023
2045	27.91962
2050	26.97341
2055	25.98646
2060	25.06061
2065	24.19609
2070	23.38968
2075	22.64742
2080	21.99217
2085	21.44078
2090	20.99675
2095	20.64586
2100	20.37058