Year	Percent
1950	14.923
1955	15.99155
1960	12.89298
1965	13.66299
1970	14.87986
1975	15.34433
1980	14.67132
1985	15.45727
1990	14.09083
1995	15.34576
2000	13.53424
2005	12.7047
2010	11.8065
2015	10.54728
2020	9.98971
2025	9.44703
2030	8.95118
2035	8.4276
2040	7.87987
2045	7.38187
2050	6.99472
2055	6.72655
2060	6.53337
2065	6.37772
2070	6.22499
2075	6.09685
2080	5.98497
2085	5.92538
2090	5.88722
2095	5.85795
2100	5.82811