Why hasn’t the chart caught up with the last two year’s worth of data?
Because the report was from the data Pew had at the time.
More:
In totality, President George W. Bush deported even more people than Obama -- and President Bill Clinton deported more than Bush.
Trump has sought to end Obama's program shielding undocumented young people from deportation and has reversed the trend on internal deportations as he's sought to remove more people, including those who have been in the country a long time.
However, Trump still has not reached anywhere near the level of interior removals as the early Obama administration, according to Cato's analysis of data through 2018. https://www.cnn.com/2019/07/13/politics/obama-trump-deportations-illegal-immigration/index.html