Year	Percent
1950	9.67751
1955	9.02145
1960	8.36064
1965	9.57771
1970	10.93039
1975	12.26661
1980	12.47336
1985	11.74014
1990	11.12697
1995	10.69157
2000	11.03151
2005	10.6019
2010	10.72494
2015	10.70372
2020	10.11456
2025	9.01865
2030	8.6475
2035	8.60112
2040	8.38169
2045	7.96068
2050	7.49026
2055	7.10752
2060	6.84912
2065	6.67182
2070	6.49407
2075	6.30864
2080	6.11783
2085	5.96043
2090	5.84528
2095	5.75529
2100	5.67937