The thing that really jumped out at me was the more than tripled cooking oil consumption over that time, without a corresponding decrease in usage of other oils (cooking oil went from 13g to 44.7g; margarine went from 6.5g to 1.6g). That's an enormous change, and it ramped up fast starting in 2000 (13g to 23g 71-88; flattish 21g to 24g 89-99; 28g to 45g 2000-2008; flattish until 2013 with a dip in 2009).
Putting it in calorie count numbers, that's a change of +230ish calories in oils over that time period ignoring the less-used ones. In terms of decreases there are really only a couple that seem notable - beef dropping from 2.6 oz/day to 1.8 oz/day and whole milk dropping from 0.7c to 0.16c - neither of which is going to have a significant impact on calories consumed.
I wonder what changed at the inflection points on the cooking oil (and shortening, which had a bump during 2000-2007) scales - they somewhat correspond with presidencies, but not directly (e.g. Clinton was still in office in 2000 during the first year of the rapid rise period).