HOG 5Y average price/sales values doesn't match the graph

When I look at https://seekingalpha.com/symbol/HOG/valuation/metrics, the average 5Y P/S is 1.77

But clicking on the graph in the same row shows that HOG's P/S over the last 5 years only went above 1.8 for a few days back in 2017.

Also, Morningstar shows 1.3 for the 5Y average: http://financials.morningstar.com/valuation/price-ratio.html?t=hog®ion=usa&culture=en-US