2016 - 21
2015 - 22
2014 - 18
2013 - 19
with just a quick glance, 2014 and 2013 had like 2-4 JUCO recruits which would have inflated the 2015/2016 classes slightly. think 2013 and 2014 also had a couple that didnt make it to campus or flamed out right after they got to campus bolstering the following classes as well.
now to compare and contrast, i believe the counts are 91 for osborne and 80 for pelini/riley.
Your numbers don't appear correct based on 247 lists.
i took the numbers from the board you are reading. if you have different numbers post them.