Year	Percent
1950	7.65194
1955	8.52054
1960	9.99147
1965	9.94124
1970	10.47326
1975	10.27904
1980	9.65687
1985	9.09212
1990	7.62837
1995	7.16426
2000	7.55364
2005	7.59417
2010	6.78652
2015	6.44156
2020	6.65422
2025	6.33892
2030	6.1811
2035	6.04246
2040	5.86732
2045	5.67846
2050	5.55901
2055	5.49924
2060	5.43865
2065	5.36834
2070	5.27484
2075	5.17763
2080	5.09998
2085	5.04973
2090	5.00896
2095	4.96882
2100	4.91973