Has the number of people becoming U.S. permanent residents or naturalized citizens actually declined, relative to the times those Fortune 500 companies were fou

Has the number of people becoming U.S. permanent residents or naturalized citizens actually declined, relative to the times those Fortune 500 companies were founded? As far as I can tell, it hasn't: somewhere around 1 million new permanent residencies are granted per year in the 2010s, versus ~250,000 in 1960, which is actually about twice as many relative to population (~0.3% of population annually now, up from ~0.15% in 1960). Sure, there are many more people wanting to become PRs than are granted, but immigration has been gradually expanding since the low of the 1930s/40s, not contracting. It's true that immigration was freer prior to the 1930s, but today is better than any other time post-WW2, in terms of the % of the population that is foreign-born, the # of naturalized citizens, the # of permanent residencies granted, etc.