Year	Percent
1950	11.38542
1955	10.96688
1960	11.61447
1965	11.76239
1970	11.81644
1975	11.92383
1980	11.9521
1985	12.07884
1990	11.68657
1995	11.51556
2000	11.95744
2005	12.59658
2010	13.33574
2015	12.99982
2020	12.9966
2025	12.81947
2030	12.84757
2035	12.66323
2040	12.39283
2045	12.05508
2050	11.68665
2055	11.34793
2060	11.0297
2065	10.68256
2070	10.31977
2075	9.95373
2080	9.62111
2085	9.30475
2090	9.00232
2095	8.70615
2100	8.41267