After reading about the recent election and hearing that the voter turnout was somewhat lower than in the last two cycles, I went and found this page from UCSB, that listed voter turnout percentages from 1824 to 2012.
On plotting the data, I noticed a large change around the years 1896-1908, where before there were turnouts in the high 70's, now they were (and remain til today) in the mid-50's to low 60's.
Were there social or political reasons why the turnout dropped so dramatically around this period compared to before? There are three data points that suggest that the turnout was lower in the 1820's (~55%), so if they are to be believed, why was there a large increase in turnout starting in the 1830's?