Year	Percent
1950	8.11272
1955	6.95667
1960	7.37259
1965	8.37714
1970	7.97467
1975	6.58372
1980	5.70114
1985	6.03663
1990	6.3639
1995	6.24845
2000	5.73232
2005	5.47502
2010	5.92015
2015	5.94876
2020	5.82715
2025	5.6269
2030	5.35976
2035	5.22192
2040	5.26289
2045	5.34629
2050	5.34816
2055	5.26951
2060	5.16401
2065	5.09012
2070	5.07494
2075	5.08597
2080	5.07853
2085	5.0315
2090	4.95431
2095	4.87832
2100	4.82855