Looked again and %’s could totally make sense.
2015 had WWE - not much of any sales, Kiss - so so sales, Got - pretty good sales, but a chunk of actual sales could have rolled over to 2016. So 2015 the base year of all the data was probably slow causing higher percentage increase ahead.
2016 - had GOT rollover sales, SMVE - ok sales, GB - strong sales and 500 sold LE’s creating a good chunk of the 40% increase over 2015, BM66 - good sales, but limited with a high cost each pin and a group of those sales may have rolled over to 2017.
2017 - had rolled over BM sales, AS sold alright, SW was a hit with 800 LE’s sold. All of these had increased price LCD’s and non LCD games all had a $300 increase which brought in more revenue.
2017 BM roll over, SW LE price and volume and LCD’s higher prices could easily add 30% over the weaker 2016.
So if you base increases on weak 2015 and better but not super great 2016 then sure revenue went up.
Just a total guess though.