Year	Percent
1950	11.22202
1955	11.63016
1960	10.81406
1965	9.9189
1970	10.98133
1975	11.68245
1980	11.82096
1985	11.61323
1990	11.71742
1995	12.16536
2000	12.75996
2005	12.24685
2010	11.53514
2015	10.45778
2020	10.60656
2025	10.7645
2030	10.26741
2035	9.57164
2040	8.90939
2045	8.52131
2050	8.32668
2055	8.09452
2060	7.75792
2065	7.36169
2070	7.02685
2075	6.79715
2080	6.63092
2085	6.47997
2090	6.3029
2095	6.12165
2100	5.9615