Year	Percent
1950	16.57144
1955	16.81393
1960	16.34407
1965	16.03335
1970	12.80041
1975	12.02365
1980	12.20649
1985	13.12677
1990	10.8914
1995	8.43266
2000	7.0676
2005	7.05225
2010	7.31059
2015	7.06592
2020	6.29638
2025	5.65503
2030	5.31282
2035	5.28111
2040	5.37511
2045	5.37241
2050	5.21331
2055	5.0119
2060	4.90637
2065	4.93191
2070	5.03166
2075	5.0993
2080	5.07935
2085	5.0003
2090	4.93732
2095	4.93724
2100	4.97454