Year	Percent
1950	14.32322
1955	15.46364
1960	16.97129
1965	17.10082
1970	16.75502
1975	15.8904
1980	14.89168
1985	13.833
1990	12.26477
1995	11.11449
2000	10.07241
2005	10.00408
2010	9.8106
2015	9.52598
2020	8.74172
2025	8.11604
2030	7.64912
2035	7.31386
2040	7.03191
2045	6.74916
2050	6.4789
2055	6.23467
2060	6.04122
2065	5.89406
2070	5.78247
2075	5.66916
2080	5.56131
2085	5.46169
2090	5.37584
2095	5.31145
2100	5.26267