Of course it was, sales are set apart between Game Boy Colour and GB meaning that they are from different generations, the GBA and the GBA SP aren't divided.
Actually I don't think you will be able to find sales for the GBC that aren't grouped together with GB sales. However the GBC is listed as being a 5th generation console and the GB a 4th generation console.
Predictions (Made July 2019)
LTD: PS4 - 130m, Switch - 110m, XBO - 52m 2019 : PS4 - 15m, Switch - 18.8m, XBO - 4.8m 2020: Switch - 22m (Peak Year)
Switch lite really screwed up my Switch prediction this year! Looks like it's going to be about 19.5m-20m for the Switch in 2019, 14.3m for PS4.