I was quoting Mark Blyth talk from memory, so I stand corrected.
But the key point is that it has gone down from around 30% in the 50s to approx 10% now (as a share of federal revenue)
From this paper decline of corporate income tax revenues
The share that corporate tax revenues comprise of total federal tax revenues also has collapsed, falling from an average of 28 percent of federal revenues in the 1950s and 21 percent in the 1960s to an average of about 10 percent since the 1980s.
What this means is that the shortfall in tax revenues has been passed on to the rest of us.
