Year	Percent
1950	10.17725
1955	11.45789
1960	10.94899
1965	10.01177
1970	9.4115
1975	11.29093
1980	10.49597
1985	9.26757
1990	9.15732
1995	10.13637
2000	10.43334
2005	9.96012
2010	9.7105
2015	8.66868
2020	8.1257
2025	7.76213
2030	8.01878
2035	7.60337
2040	7.26792
2045	6.90684
2050	6.59278
2055	6.3666
2060	6.23444
2065	6.12083
2070	5.99732
2075	5.8477
2080	5.71559
2085	5.6121
2090	5.53496
2095	5.48019
2100	5.425