According to DEA data “currently, about 20 tons of hydrocodone products are used annually in the United States.” If my math & unit conversions are correct this adds up to the following breakdown:

20.00 tons
2,000.00 lbs/ton
40,000.00 lbs
16.00 oz/lb
640,000.00 oz
18,143.69 kg
18,143,694.80 g
18,143,694,800.00 mg
2,419,159,306.67 tablets . . . @ 7.5 mg strength (assumes they are not including APAP)

Current US Census Bureau has US population clock @ 292,001,133. So this means per DEA we have enough hydrocodone for 8.28 tablets per every US citizen/yr. I must be bored . . . .