Year	Percent
1950	27.80808
1955	28.07276
1960	27.34098
1965	26.38186
1970	26.29074
1975	27.1543
1980	28.65414
1985	30.85385
1990	32.08969
1995	32.31639
2000	32.32066
2005	31.83417
2010	31.90964
2015	32.05407
2020	31.6924
2025	31.14431
2030	30.3717
2035	29.82033
2040	29.35581
2045	28.77768
2050	28.06452
2055	27.25356
2060	26.44766
2065	25.69856
2070	24.99327
2075	24.357
2080	23.78558
2085	23.27894
2090	22.85311
2095	22.50066
2100	22.21201