Year	Percent
1950	26.90973
1955	28.5653
1960	30.67999
1965	28.13097
1970	23.48248
1975	24.47687
1980	24.80567
1985	27.34027
1990	28.04055
1995	27.97519
2000	28.44279
2005	29.85863
2010	31.72177
2015	32.48209
2020	32.50636
2025	31.14464
2030	30.12422
2035	30.47068
2040	30.99623
2045	31.59405
2050	31.06294
2055	29.94024
2060	29.2466
2065	29.08755
2070	29.07414
2075	28.73645
2080	27.96873
2085	27.05371
2090	26.31788
2095	25.81693
2100	25.37166