Year	Percent
1950	11.42375
1955	11.44312
1960	11.27642
1965	11.76023
1970	12.01695
1975	11.9542
1980	11.83709
1985	12.53574
1990	13.62292
1995	12.4335
2000	12.18941
2005	12.35938
2010	12.6681
2015	12.92355
2020	12.8407
2025	12.56559
2030	12.16861
2035	11.92577
2040	11.68474
2045	11.37559
2050	10.98054
2055	10.55819
2060	10.13233
2065	9.731
2070	9.35143
2075	8.98185
2080	8.63408
2085	8.29719
2090	7.98618
2095	7.68888
2100	7.40977