I'm looking at some Email Performance Reports that I created last year and the numbers have changes dramatically. e.g. when I checked one particular report in November last year the total sent number was: 799,535 (now 662,867) and the average open rate was 18.0% (now 22.3%) . These reports have been untouched and we haven't deleted any programs. We cleaned our database and deleted some records in November. Would this have meant that these records have been removed from our email performance reports and changed the numbers?