Year	Percent
1950	9.24839
1955	9.48433
1960	9.22791
1965	9.90899
1970	10.03183
1975	9.50249
1980	9.22826
1985	8.62596
1990	6.79661
1995	5.58601
2000	5.04317
2005	4.71154
2010	5.10057
2015	5.55825
2020	4.91945
2025	4.51603
2030	4.19201
2035	4.08512
2040	4.19323
2045	4.40107
2050	4.55096
2055	4.5427
2060	4.46638
2065	4.44581
2070	4.51433
2075	4.64073
2080	4.75382
2085	4.7879
2090	4.74422
2095	4.66885
2100	4.62743