"Later, the voting records were checked to determine the proportion of people receiving each type of call who actually voted." Wait a minute. People who have n

"Later, the voting records were checked to determine the proportion of people receiving each type of call who actually voted." Wait a minute. People who have nothing to do with running an election are able to check to see if you voted? I thought part of "secret ballot" included that it's a secret whether you voted or not. I always assumed that no one outside election officials had access to this bit. I was wrong?