Craft beer sales increased 20% from 2012 to 2013, and the popularity has created a shortage of hops, which give beer its bitterness. Prices have increased from $1.44 per pound in 2004 to $3.59 last year. Most hops are grown in the Pacific Northwest. Washington state increased its harvest by 13% in 2013, but craft brewers are demanding aroma hops that are more difficult to grow and take five years to reach full production.

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