Year	Percent
1950	13.36042
1955	13.28533
1960	13.91348
1965	14.25886
1970	14.28912
1975	14.28669
1980	14.60409
1985	14.96232
1990	16.27518
1995	15.00539
2000	15.21398
2005	15.42737
2010	15.63754
2015	15.42077
2020	14.96513
2025	14.3725
2030	13.95342
2035	13.53417
2040	13.04921
2045	12.48484
2050	11.91121
2055	11.34956
2060	10.82449
2065	10.33402
2070	9.8647
2075	9.4278
2080	9.00956
2085	8.625
2090	8.26049
2095	7.91716
2100	7.61721