Click View Stats on the Cancel/Pause Funnel Reasons page (or open /admin/subscriptionreasonstats). The Cancel/Pause Funnel Reasons — Stats page has a Search box and a table with:

• Name — the reason.
• Usage — a bar plus "X% (N)": the share and count of times it was chosen.
• Types — whether it is used for Paused, Canceled or both.
• View — opens a pop-up listing the subscriptions behind the number.

The list loads as you scroll and only includes active reasons.