There is no reason to believe that the percentage would have been any larger than the percentage of the population as a whole. And regardless they would have all been consumers.
We don’t need consumers we need producers with the money to PAY for their own consumption.
Since members of the welfare class are more likely to get abortions I would say it would be 50/50.
This Tea Party issue though says nothing about the “organization” in any case. It was one event and the decision was made by the organizer. There is no centralized Tea Party decision making group. There isn’t even a leader. Anyone can call themselves Tea Partyers. You could start a Tea Party for Life group and run your own rallies devoted totally to Pro-Life concerns.