Year	Percent
1950	28.21053
1955	25.55728
1960	24.96456
1965	24.13668
1970	22.0896
1975	21.71851
1980	23.2185
1985	25.64128
1990	28.38591
1995	28.44549
2000	28.40158
2005	27.67981
2010	26.83763
2015	26.10305
2020	26.491
2025	27.58448
2030	29.86115
2035	30.58734
2040	30.07359
2045	29.24683
2050	27.77693
2055	27.37014
2060	27.73949
2065	27.93589
2070	27.47628
2075	26.37802
2080	25.20771
2085	24.46077
2090	24.21201
2095	24.12951
2100	23.80483