Year	Percent
1950	11.20651
1955	12.56077
1960	14.46956
1965	14.44644
1970	13.50269
1975	13.2881
1980	9.50754
1985	8.54907
1990	7.60901
1995	7.68536
2000	7.16123
2005	6.45208
2010	6.2196
2015	6.06315
2020	4.526
2025	4.80659
2030	4.54548
2035	4.53456
2040	4.63766
2045	4.65976
2050	4.48802
2055	4.30912
2060	4.29416
2065	4.38563
2070	4.49723
2075	4.55423
2080	4.50429
2085	4.38726
2090	4.30042
2095	4.28391
2100	4.31725