Year	Percent
1950	9.60399
1955	8.58752
1960	8.28632
1965	8.16135
1970	9.1587
1975	8.82786
1980	7.93947
1985	7.67638
1990	7.1413
1995	7.4323
2000	7.9092
2005	7.0419
2010	5.54011
2015	4.69596
2020	4.84323
2025	5.38929
2030	5.52347
2035	5.65431
2040	5.4033
2045	5.02128
2050	4.94278
2055	5.18463
2060	5.45357
2065	5.55542
2070	5.4513
2075	5.24459
2080	5.1287
2085	5.19077
2090	5.33261
2095	5.40351
2100	5.33749