Here are a couple more widgets in Analytics to show trending data by month:
Average Offer Acceptance Rate (rolling six months)
Offer Acceptance rate found here is the total number of offers accepted divided by the total number of offers which were marked as hired or declined within the preceding six months. Offers that are still open are not included in this calculation.
Average Time to Hire (rolling six months)
This new widget found here is the average number of days between the date a candidate’s application was created and the offer acceptance date. Each month's average Time to Hire number is based on candidates whose offer acceptance date is within the preceding six months.