Year	Percent
1950	12.43825
1955	12.45875
1960	12.12654
1965	12.19738
1970	12.70981
1975	13.25135
1980	14.04954
1985	14.39086
1990	14.66384
1995	14.48372
2000	14.35566
2005	14.5371
2010	14.55401
2015	14.39793
2020	13.56308
2025	12.88202
2030	12.23199
2035	11.60912
2040	10.97785
2045	10.37247
2050	9.79127
2055	9.26303
2060	8.79711
2065	8.35234
2070	7.96209
2075	7.6054
2080	7.29526
2085	7.02567
2090	6.80045
2095	6.61161
2100	6.44277