the shortcodes have the form [learndash-stats type="" category=""]
[learndash-stats type="certs"] displays number of certificates issued to user: 0
[learndash-stats type="percent"] displays number of certificates issued to user as a percentage of the total number of courses available: 0
[learndash-stats type="category" category="Online Conference 2016"] displays number of certificates issued to user for courses in this category: 0
old version of [uo_ceu_total] gives 310, new version gives 0