Year	Percent
1950	12.15959
1955	10.93499
1960	12.23085
1965	12.87638
1970	13.93666
1975	14.22805
1980	12.82148
1985	10.91403
1990	11.39092
1995	12.2031
2000	13.03041
2005	12.26423
2010	12.27018
2015	10.12597
2020	11.4369
2025	11.24664
2030	10.91178
2035	10.39096
2040	9.75311
2045	9.24504
2050	9.17884
2055	9.30227
2060	9.19109
2065	8.85344
2070	8.42195
2075	8.06546
2080	7.8936
2085	7.84272
2090	7.76246
2095	7.53281
2100	7.20796