Year	Percent
1950	9.80524
1955	9.82256
1960	9.61617
1965	11.06116
1970	10.84997
1975	11.05576
1980	11.68566
1985	9.88014
1990	10.67444
1995	12.37254
2000	11.43755
2005	10.86951
2010	10.93039
2015	11.04737
2020	11.34794
2025	11.54793
2030	11.524
2035	11.41043
2040	11.04845
2045	10.53742
2050	10.0254
2055	9.57357
2060	9.11799
2065	8.68368
2070	8.26466
2075	7.85721
2080	7.4876
2085	7.13795
2090	6.83702
2095	6.5634
2100	6.31828