Year	Percent
1950	13.35438
1955	11.20366
1960	9.87721
1965	9.08791
1970	7.97201
1975	6.7866
1980	7.08525
1985	7.00082
1990	6.56337
1995	6.6781
2000	5.94165
2005	5.65776
2010	5.85775
2015	5.69474
2020	5.69447
2025	5.59783
2030	5.43581
2035	5.32144
2040	5.31594
2045	5.36229
2050	5.37866
2055	5.34311
2060	5.27861
2065	5.20328
2070	5.15554
2075	5.13217
2080	5.11454
2085	5.08504
2090	5.03397
2095	4.97469
2100	4.92286