What was the ethnic composition of Massachusetts in the decades before the Civil War? I am particularly interested in knowing what percentage of the population claimed English, Scottish, North Irish, and Irish descent (but information on other groups is welcome). The only good source I've found is the 1790 Census, but obviously the ethnic makeup of Massachusetts was very different only a few decades later.
Ideally, someone knows of a table that updates these figures every decade, but I'd still really appreciate any solid, empirically grounded estimates at any point between 1790 and 1860. I might use these figures in calculations for an academic article, so good answers will be sourced.