Year	Percent
1950	7.2392
1955	8.01381
1960	7.15251
1965	6.63561
1970	7.70006
1975	8.46997
1980	8.19439
1985	6.66302
1990	5.6012
1995	5.98084
2000	5.78256
2005	5.91882
2010	5.22865
2015	4.79775
2020	4.60364
2025	4.65773
2030	4.85138
2035	4.87032
2040	4.72231
2045	4.52226
2050	4.42958
2055	4.49368
2060	4.64736
2065	4.78101
2070	4.80702
2075	4.7514
2080	4.68723
2085	4.68225
2090	4.72462
2095	4.77438
2100	4.78359