Year	Percent
1950	11.59819
1955	8.87
1960	8.03191
1965	11.15161
1970	12.52345
1975	11.18256
1980	8.87821
1985	8.91907
1990	9.16562
1995	9.97584
2000	10.58087
2005	8.31867
2010	6.33788
2015	5.32183
2020	5.72924
2025	6.03135
2030	5.49644
2035	5.01832
2040	4.70806
2045	4.53074
2050	4.60268
2055	4.78766
2060	4.87992
2065	4.83268
2070	4.75754
2075	4.76066
2080	4.86121
2085	4.99851
2090	5.08275
2095	5.06248
2100	4.98319