Year	Percent
1950	8.797
1955	9.50358
1960	13.65566
1965	15.0132
1970	15.68249
1975	13.88665
1980	13.35183
1985	13.10233
1990	13.4298
1995	13.85786
2000	13.0788
2005	10.66785
2010	8.94327
2015	9.49271
2020	9.58006
2025	8.93393
2030	7.91187
2035	7.09409
2040	6.73963
2045	6.62782
2050	6.4862
2055	6.17888
2060	5.82963
2065	5.56788
2070	5.45195
2075	5.41631
2080	5.37735
2085	5.28967
2090	5.16611
2095	5.05926
2100	5.00489