Year	Percent
1950	9.84174
1955	9.30155
1960	9.10685
1965	9.936
1970	8.9169
1975	11.29731
1980	11.39398
1985	11.60112
1990	10.58308
1995	9.68888
2000	9.56652
2005	9.20055
2010	9.59563
2015	9.38575
2020	7.72948
2025	7.01269
2030	6.2936
2035	7.07979
2040	6.61585
2045	6.05943
2050	5.52939
2055	5.14588
2060	4.99091
2065	4.9714
2070	4.94348
2075	4.80387
2080	4.56786
2085	4.40257
2090	4.35254
2095	4.39671
2100	4.43347