Year	Percent
1950	11.32756
1955	11.0976
1960	11.0908
1965	11.27104
1970	11.28164
1975	11.6824
1980	12.0086
1985	12.21665
1990	12.51254
1995	13.08864
2000	13.2338
2005	12.77484
2010	12.25784
2015	12.38724
2020	12.53636
2025	12.33732
2030	11.86842
2035	11.41342
2040	11.01552
2045	10.69561
2050	10.35903
2055	10.04131
2060	9.70674
2065	9.36173
2070	9.02463
2075	8.7287
2080	8.46314
2085	8.19136
2090	7.92279
2095	7.65788
2100	7.40318