Year	Percent
1950	29.64177
1955	27.11089
1960	25.97831
1965	25.2523
1970	23.56418
1975	24.75709
1980	24.707
1985	25.16515
1990	26.6152
1995	27.81344
2000	29.74438
2005	30.5177
2010	29.87716
2015	29.71264
2020	29.57166
2025	29.4754
2030	29.58809
2035	29.95386
2040	30.12045
2045	30.27355
2050	30.20727
2055	29.94229
2060	29.75152
2065	29.60129
2070	29.42133
2075	29.16959
2080	28.83603
2085	28.48023
2090	28.11101
2095	27.74436
2100	27.36875