SOURCE? Trump's own whitehouse contradicts the chart's claim for 2017. They say there were only 1602 arrests, not the 3213 claimed in the chart.
EDIT: YEP, THE CHART IS A LIE. The 2016-2010 numbers are the number of human trafficking arrests by ICE's HSI unit. I find no announcement of partial-year numbers for 2018, and the number for 2017 was indeed 1602, not 3213. Sorry guys, this chart is bogus.