Year	Percent
1950	8.97491
1955	9.89608
1960	6.78834
1965	11.10869
1970	10.28661
1975	8.90277
1980	8.85248
1985	6.91818
1990	7.37698
1995	7.76193
2000	7.34216
2005	7.06881
2010	6.43364
2015	5.62888
2020	4.75777
2025	4.70759
2030	4.96064
2035	5.04173
2040	5.08664
2045	4.92675
2050	4.64523
2055	4.47015
2060	4.51105
2065	4.67555
2070	4.81377
2075	4.84545
2080	4.78446
2085	4.70058
2090	4.68041
2095	4.74016
2100	4.81603