Year	Percent
1950	9.50251
1955	8.43032
1960	8.68821
1965	11.10628
1970	12.4164
1975	12.44127
1980	12.06651
1985	11.73801
1990	11.06382
1995	10.88946
2000	10.9139
2005	10.27698
2010	7.60754
2015	6.79269
2020	6.92019
2025	7.00175
2030	6.73548
2035	6.49946
2040	5.90986
2045	5.40654
2050	5.29245
2055	5.38112
2060	5.4293
2065	5.35266
2070	5.17476
2075	5.00223
2080	4.94675
2085	5.00592
2090	5.0747
2095	5.07232
2100	4.98696