Employee counts via Form 10-K releases (as of EoY each year):

2013: 47,756 (too lazy to look earlier)

2014: 53,600 (+12.2% YoY)

2015: 61,814 (+15.3% YoY)

2016: 72,053 (+16.5% YoY)

2017: 80,110 (+11.1% YoY)

2018: 98,771 (+23.2% YoY)

Source: https://abc.xyz/investor/

This does not include contractor, temp, and vendors