The Decline of the WASP Establishment

Charles Blow has a piece on religion and representation in Congress in the Times today. I'm mainly interested in the graphic accompanying the piece showing changes in representation from 1961-2 to now. Catholic, "Other Protestant" and Jewish have all risen (maybe 50 percent or more based on eyeballing), while Episcopal, Methodist, Presbyterian, and Congregationalist have all fallen at roughly the same rate.  Baptists and Lutherans remained relatively steady. In other words, the 2nd, 3rd, 4th and 6th ranking denominations in 1961 fell drastically.