Year	Percent
1950	10.24739
1955	9.29639
1960	8.02226
1965	8.84028
1970	10.69401
1975	10.82456
1980	10.53739
1985	9.97966
1990	10.25915
1995	11.33842
2000	13.17526
2005	13.33729
2010	9.44501
2015	6.58726
2020	6.25359
2025	7.29898
2030	7.58924
2035	6.69751
2040	5.52349
2045	4.6678
2050	4.47103
2055	4.73462
2060	5.01028
2065	4.96097
2070	4.65983
2075	4.38718
2080	4.3562
2085	4.55219
2090	4.78478
2095	4.85596
2100	4.75195