Year	Percent
1950	8.46988
1955	7.36364
1960	6.94777
1965	8.48905
1970	9.54405
1975	10.27392
1980	10.41543
1985	9.86658
1990	8.78322
1995	9.192
2000	8.16306
2005	8.90001
2010	8.43108
2015	8.92428
2020	9.10425
2025	9.06188
2030	8.51211
2035	7.98877
2040	7.72654
2045	7.65712
2050	7.5995
2055	7.4682
2060	7.24131
2065	6.97768
2070	6.74653
2075	6.58162
2080	6.45452
2085	6.30542
2090	6.12614
2095	5.93558
2100	5.76809