Year	Percent
1950	14.8797
1955	14.82238
1960	15.21965
1965	15.36117
1970	15.50347
1975	14.97488
1980	14.73088
1985	14.73598
1990	14.62428
1995	13.94832
2000	13.63335
2005	13.23506
2010	11.87382
2015	12.28675
2020	11.3299
2025	10.8131
2030	10.26089
2035	9.78347
2040	9.3943
2045	8.99926
2050	8.62146
2055	8.25508
2060	7.88452
2065	7.54985
2070	7.23874
2075	6.96419
2080	6.69456
2085	6.44088
2090	6.20607
2095	5.99892
2100	5.81076