Year	Percent
1950	9.96368
1955	9.8765
1960	9.87307
1965	10.54302
1970	10.01262
1975	11.34267
1980	11.79165
1985	10.57884
1990	8.97666
1995	9.31757
2000	9.73819
2005	9.65782
2010	9.05381
2015	8.26097
2020	7.19441
2025	6.90142
2030	6.48572
2035	6.14925
2040	5.78252
2045	5.48185
2050	5.24453
2055	5.06689
2060	4.96252
2065	4.87806
2070	4.80375
2075	4.73181
2080	4.69397
2085	4.67859
2090	4.6818
2095	4.69077
2100	4.68843