Year	Percent
1950	12.64589
1955	13.7547
1960	14.43375
1965	15.17486
1970	15.79945
1975	13.43802
1980	12.83294
1985	10.89451
1990	11.3991
1995	10.04105
2000	10.24439
2005	8.38545
2010	6.8622
2015	7.01508
2020	6.87938
2025	6.59404
2030	6.28058
2035	5.91455
2040	5.55211
2045	5.32471
2050	5.28476
2055	5.30044
2060	5.24783
2065	5.13992
2070	5.02368
2075	4.94399
2080	4.92199
2085	4.9396
2090	4.95007
2095	4.92167
2100	4.86789