Year	Percent
1950	6.16988
1955	7.72877
1960	9.23164
1965	8.70867
1970	7.32763
1975	6.75428
1980	6.59038
1985	8.1619
1990	8.61812
1995	6.6637
2000	6.30054
2005	5.79438
2010	4.29015
2015	4.53497
2020	5.38265
2025	5.23809
2030	5.13389
2035	4.90486
2040	4.60674
2045	4.49582
2050	4.74193
2055	5.03365
2060	5.12604
2065	5.0729
2070	4.96559
2075	4.89863
2080	4.95336
2085	5.09381
2090	5.18392
2095	5.15514
2100	5.04526