According to Pew Research, the U.S. Latino population was at 59.9 million people in 2018, although the growth rate has slowed down. In a Monday post about the largest ethnic group in the country, Pew said that 59.9 million figure for 2018 was 1.2 million more than the 2017 population and 12.1 million more than the 2008 population, even though annual average growth from 2015-2018 has been at 2% (it was at 3.4% growth from 2010–2015).
This is the Pew chart about population numbers.
And this is the Pew chart about annual average growth.
Pew also noted what parts of the U.S. have seen the biggest Latino population growth.
As for Puerto Rico, Pew said that the island-colony continues to see a significant population decrease.