Year	Percent
1950	19.66304
1955	18.83981
1960	16.90006
1965	16.21257
1970	19.02215
1975	21.40702
1980	25.06093
1985	24.14589
1990	21.72774
1995	21.51526
2000	21.83383
2005	24.64282
2010	26.14613
2015	26.7707
2020	26.24505
2025	25.70543
2030	26.60453
2035	26.91149
2040	26.16241
2045	24.79785
2050	24.11662
2055	24.6478
2060	25.64556
2065	26.5356
2070	25.81345
2075	24.2269
2080	23.5006
2085	23.66857
2090	24.16125
2095	24.34147
2100	24.00101