Year	Percent
1950	13.13217
1955	8.01207
1960	8.95701
1965	10.60527
1970	9.88988
1975	9.06282
1980	7.54122
1985	7.8513
1990	7.80579
1995	8.20282
2000	7.79688
2005	6.41646
2010	5.15797
2015	4.84949
2020	6.0296
2025	6.29028
2030	6.14454
2035	5.80764
2040	5.41478
2045	5.25866
2050	5.47646
2055	5.80289
2060	5.91993
2065	5.78707
2070	5.57261
2075	5.44466
2080	5.47178
2085	5.58264
2090	5.63136
2095	5.55879
2100	5.41201