Year	Percent
1950	12.1108
1955	12.03579
1960	12.15196
1965	13.83546
1970	13.56362
1975	13.28525
1980	12.86133
1985	12.43749
1990	12.24736
1995	12.10447
2000	12.09445
2005	11.68877
2010	11.21531
2015	10.55926
2020	10.06302
2025	9.84346
2030	9.56475
2035	9.23503
2040	8.90384
2045	8.58836
2050	8.27526
2055	7.98331
2060	7.71411
2065	7.44242
2070	7.16537
2075	6.91895
2080	6.69618
2085	6.50018
2090	6.31909
2095	6.15056
2100	5.99638