Notice a trend here?
In 1911, exactly one hundred years ago, world consumption of hops was 0.63 pounds per hectoliter (0.54 per barrel), amounting to 12.6 grams of alpha per hectoliter.
The best comparison going forward is grams of alpha per hectoliter, rather than bulk, because of the advent of high alpha hops and the use of pellets and extracts.
In the early 1970s when about one-third of hops were processed, compared to nearly 90 percent today the rate was 9 grams per hectoliter.
Here’s how it has progressed since:
1979 – 8 grams
1989 – 7 grams
1997 – 6 grams
2011 – 4.1 grams
Source: Barth Report, from the Barth Haas Group