Year	Percent
1950	28.32776
1955	27.62188
1960	27.9749
1965	25.7575
1970	25.97143
1975	26.75286
1980	28.571
1985	30.77821
1990	30.59783
1995	29.81609
2000	28.06725
2005	26.47053
2010	25.83867
2015	25.59855
2020	24.87167
2025	23.91105
2030	23.37807
2035	22.99695
2040	23.16326
2045	23.30667
2050	23.07346
2055	22.76336
2060	22.47739
2065	22.37413
2070	22.4073
2075	22.46922
2080	22.40878
2085	22.20295
2090	21.937
2095	21.70459
2100	21.55139