Year	Percent
1950	10.1836
1955	8.31384
1960	7.21094
1965	7.45706
1970	9.83872
1975	11.15739
1980	11.24261
1985	10.90478
1990	10.66878
1995	10.24177
2000	10.46478
2005	10.61696
2010	10.04985
2015	7.46139
2020	6.70231
2025	6.97692
2030	7.19648
2035	6.92632
2040	6.65611
2045	6.01433
2050	5.53109
2055	5.44717
2060	5.57255
2065	5.65257
2070	5.59318
2075	5.41756
2080	5.24122
2085	5.18364
2090	5.24234
2095	5.30881
2100	5.30196