Year	Percent
1950	9.62045
1955	10.2524
1960	9.48782
1965	8.96027
1970	9.85
1975	10.90639
1980	11.23738
1985	10.31998
1990	9.74614
1995	9.53586
2000	9.23202
2005	10.26985
2010	9.62413
2015	8.55463
2020	6.56386
2025	5.27059
2030	5.65194
2035	5.58421
2040	5.61464
2045	5.47014
2050	5.09365
2055	4.71359
2060	4.59035
2065	4.67785
2070	4.75783
2075	4.74313
2080	4.63483
2085	4.51352
2090	4.47961
2095	4.55224
2100	4.64476