Year	Percent
1950	12.61432
1955	12.51522
1960	11.6874
1965	11.84305
1970	12.43917
1975	13.05649
1980	13.94682
1985	14.36346
1990	14.68093
1995	14.51775
2000	14.39397
2005	14.57605
2010	14.67356
2015	14.51568
2020	13.69319
2025	13.00901
2030	12.35747
2035	11.7097
2040	11.0641
2045	10.45476
2050	9.87367
2055	9.34934
2060	8.88746
2065	8.44711
2070	8.06195
2075	7.71047
2080	7.40721
2085	7.14811
2090	6.93495
2095	6.75884
2100	6.6018