Year	Percent
1950	7.92265
1955	8.1071
1960	7.81456
1965	7.59085
1970	7.42213
1975	6.94937
1980	7.42284
1985	7.23865
1990	7.4738
1995	7.61955
2000	5.71813
2005	4.45285
2010	4.86772
2015	5.85386
2020	5.4505
2025	5.3949
2030	5.11754
2035	4.71591
2040	4.60623
2045	4.8346
2050	5.06977
2055	5.10152
2060	4.9686
2065	4.80347
2070	4.7259
2075	4.80018
2080	4.94766
2085	5.03217
2090	4.98496
2095	4.85591
2100	4.75482