Year	Percent
1950	27.60197
1955	27.99548
1960	27.31931
1965	26.37217
1970	26.29477
1975	27.13568
1980	28.63152
1985	30.83048
1990	32.05006
1995	32.28895
2000	32.30585
2005	31.80207
2010	31.82501
2015	31.89702
2020	31.45209
2025	30.81219
2030	29.94485
2035	29.29642
2040	28.74276
2045	28.08414
2050	27.30684
2055	26.45824
2060	25.63846
2065	24.89525
2070	24.20636
2075	23.5897
2080	23.04064
2085	22.55742
2090	22.15408
2095	21.81846
2100	21.54217