Year	Percent
1950	7.36154
1955	6.40811
1960	6.40151
1965	6.72972
1970	6.71545
1975	5.93779
1980	6.43292
1985	6.13656
1990	6.68443
1995	7.00752
2000	5.4127
2005	3.65187
2010	4.16323
2015	4.84789
2020	4.71783
2025	4.61752
2030	4.43936
2035	4.1495
2040	4.06885
2045	4.36569
2050	4.71481
2055	4.82815
2060	4.74151
2065	4.60105
2070	4.54109
2075	4.64225
2080	4.82904
2085	4.95341
2090	4.92596
2095	4.79722
2100	4.68956