Year	Percent
1950	16.97054
1955	17.37832
1960	17.35322
1965	17.39432
1970	17.49501
1975	17.39106
1980	17.66849
1985	17.57906
1990	18.5367
1995	19.24327
2000	19.96043
2005	19.1619
2010	18.769
2015	18.14631
2020	17.89448
2025	17.31075
2030	16.60848
2035	15.84128
2040	15.07308
2045	14.36348
2050	13.69087
2055	12.99404
2060	12.30819
2065	11.64805
2070	11.05387
2075	10.49677
2080	9.97756
2085	9.4803
2090	9.00359
2095	8.54152
2100	8.12769