Year	Percent
1950	10.46367
1955	9.07599
1960	9.09355
1965	8.63475
1970	7.97956
1975	8.38687
1980	8.11299
1985	8.34528
1990	8.3342
1995	6.16494
2000	4.82853
2005	5.3879
2010	6.45162
2015	5.91981
2020	5.82975
2025	5.47489
2030	5.0118
2035	4.8764
2040	5.09507
2045	5.30751
2050	5.30318
2055	5.13376
2060	4.94225
2065	4.8529
2070	4.92754
2075	5.08201
2080	5.1719
2085	5.12483
2090	4.99101
2095	4.88254
2100	4.8578