Year	Percent
1950	13.62639
1955	14.80772
1960	14.04411
1965	14.19928
1970	13.8017
1975	13.44434
1980	10.99708
1985	10.36357
1990	12.88831
1995	14.00185
2000	13.18183
2005	13.65437
2010	13.43929
2015	12.28828
2020	11.2669
2025	10.69926
2030	10.38927
2035	10.08161
2040	9.68413
2045	9.19706
2050	8.70528
2055	8.29153
2060	7.97759
2065	7.71665
2070	7.43769
2075	7.1289
2080	6.81816
2085	6.54836
2090	6.31657
2095	6.13109
2100	5.96867