Year	Percent
1950	26.04246
1955	26.47603
1960	23.16544
1965	22.91847
1970	22.66831
1975	22.53971
1980	24.14103
1985	22.76283
1990	24.11164
1995	25.2911
2000	26.5396
2005	27.86799
2010	27.20071
2015	26.9013
2020	26.0807
2025	25.27413
2030	24.42635
2035	23.48447
2040	23.36129
2045	23.33734
2050	23.56346
2055	23.84517
2060	23.82342
2065	23.54824
2070	23.20209
2075	23.04883
2080	23.03368
2085	23.02502
2090	22.91862
2095	22.70022
2100	22.46034