Year	Percent
1950	9.29404
1955	10.34177
1960	10.3985
1965	10.04463
1970	10.59997
1975	9.74983
1980	10.52608
1985	10.20904
1990	9.59376
1995	7.86533
2000	6.65656
2005	6.5054
2010	6.84074
2015	7.56747
2020	7.23788
2025	6.41323
2030	5.73161
2035	5.48079
2040	5.63753
2045	5.88997
2050	5.94619
2055	5.75376
2060	5.46996
2065	5.29288
2070	5.2963
2075	5.38958
2080	5.45045
2085	5.39193
2090	5.24068
2095	5.09742
2100	5.03206