Year	Percent
1950	10.14439
1955	9.96844
1960	6.36205
1965	6.94427
1970	8.66121
1975	9.67214
1980	8.82486
1985	7.22493
1990	7.11122
1995	7.2769
2000	8.00892
2005	7.9898
2010	6.38155
2015	4.86394
2020	4.70886
2025	5.49953
2030	6.28448
2035	6.16024
2040	5.79172
2045	5.30211
2050	5.11424
2055	5.38143
2060	5.79094
2065	5.96807
2070	5.82279
2075	5.55228
2080	5.39559
2085	5.43843
2090	5.59408
2095	5.67871
2100	5.6138