Year	Percent
1950	10.21449
1955	9.63227
1960	8.96477
1965	9.70645
1970	8.86449
1975	11.6054
1980	11.48108
1985	11.80418
1990	10.75231
1995	9.83507
2000	9.5962
2005	9.61371
2010	9.88812
2015	9.64681
2020	7.97653
2025	7.19679
2030	6.53601
2035	7.33969
2040	6.87106
2045	6.3019
2050	5.75671
2055	5.35757
2060	5.18949
2065	5.15701
2070	5.11146
2075	4.94968
2080	4.69057
2085	4.50621
2090	4.44192
2095	4.4728
2100	4.49954