Year	Percent
1950	10.12653
1955	9.10537
1960	7.89234
1965	8.67601
1970	10.89745
1975	10.94807
1980	10.66057
1985	10.16969
1990	10.30479
1995	11.30531
2000	13.40348
2005	13.14836
2010	9.80092
2015	7.24556
2020	6.68717
2025	7.41686
2030	7.81205
2035	7.00581
2040	5.78802
2045	4.89993
2050	4.70126
2055	4.98296
2060	5.27266
2065	5.21037
2070	4.87397
2075	4.56263
2080	4.50178
2085	4.67955
2090	4.9043
2095	4.97548
2100	4.87231