Year	Percent
1950	15.06396
1955	13.21617
1960	12.74018
1965	10.51745
1970	7.71511
1975	8.08405
1980	8.67664
1985	8.20055
1990	7.53202
1995	6.85055
2000	6.21956
2005	5.0095
2010	4.77422
2015	4.98368
2020	4.98293
2025	4.92078
2030	4.69039
2035	4.39048
2040	4.2236
2045	4.27046
2050	4.4215
2055	4.5245
2060	4.51521
2065	4.42881
2070	4.34477
2075	4.34786
2080	4.44305
2085	4.5582
2090	4.61329
2095	4.59325
2100	4.52699