Year	Percent
1950	9.02454
1955	8.63067
1960	7.84123
1965	7.01185
1970	7.01567
1975	7.94166
1980	7.87152
1985	7.11516
1990	6.94911
1995	6.5406
2000	6.86285
2005	7.08309
2010	6.56603
2015	5.21143
2020	4.26557
2025	4.46238
2030	4.98021
2035	5.13265
2040	5.27743
2045	5.0569
2050	4.71494
2055	4.66536
2060	4.92393
2065	5.20983
2070	5.33032
2075	5.24386
2080	5.05309
2085	4.94915
2090	5.01632
2095	5.15831
2100	5.23137