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Barbiturates Use Statistics
by Erowid
16.9 16.2 15.6 13.7 11.8 11.0 11.3 10.3 9.9 9.9 9.2 8.4 7.4 6.7 6.5 6.8 6.2 5.5 6.3 7.0 7.4 7.6 8.1 8.7 8.9 9.2 8.7