Need another sign that Americans are merrier about the economy?

Check out how sales of Christmas trees are shooting up.

The chart below indicates that sales have increased 10 percent from a year ago, in the four-week period ended Tuesday. (Hat tip to the Daily Shot and Evercore ISI for the graphic.)

The figures on Christmas trees provide “an interesting metric of U.S. consumer health,” and sales have shown “the biggest increase in years,” says the latest Daily Shot.

The jump in tree sales echoes the excitement surveys have found among business leaders and consumers for the incoming Trump administration.

One poll showed a marked gain in enthusiasm about the economy among Republican consumers that outstripped a decline in optimism among Democrats, as a MarketWatch story put it.

There is also a partisan tone to the tree sales, according to some takes. In states that Trump won, the festive evergreens are going faster, while blue states are seeing a drop from a year ago, according to a Zero Hedge post citing an Evercore ISI report.

There is no ETF tied to the Christmas tree industry, but there are timber ETFs. The iShares Global Timber & Forestry ETF is ETF.com’s analyst pick for betting on forestry companies, and WOOD has gained 8 percent since Election Day as of Wednesday’s close, while the S&P 500 is up 6 percent.