Year	Percent
1950	14.38233
1955	14.11017
1960	13.91103
1965	12.66366
1970	12.46933
1975	11.20289
1980	10.32716
1985	9.75962
1990	8.97116
1995	8.12724
2000	8.01943
2005	7.43629
2010	6.81326
2015	6.28024
2020	5.48969
2025	5.20075
2030	4.98037
2035	4.82629
2040	4.63227
2045	4.41861
2050	4.23961
2055	4.12674
2060	4.09147
2065	4.08785
2070	4.07776
2075	4.05304
2080	4.03315
2085	4.03605
2090	4.08397
2095	4.15038
2100	4.20277