Year	Percent
1950	9.59241
1955	8.81268
1960	8.80982
1965	9.11894
1970	8.58964
1975	7.23267
1980	5.93584
1985	6.00979
1990	6.03314
1995	6.36767
2000	5.87905
2005	5.18369
2010	5.12901
2015	5.33343
2020	5.42219
2025	5.2518
2030	5.01461
2035	4.81083
2040	4.73367
2045	4.78707
2050	4.90124
2055	4.96928
2060	4.95432
2065	4.87654
2070	4.80699
2075	4.78411
2080	4.7994
2085	4.81729
2090	4.79742
2095	4.73403
2100	4.65106