Level...CON.....Health from CON.....CONHealth*1.15...Actual HP (Normal mode)
1.......5..........52................59,8..............59
1.......6..........62 (+10)..........71,3..............71
1.......7..........72 (+10)..........82,8..............82
1.......8..........83 (+11)..........95,45.............95
1.......9..........95 (+12).........109,25............109
1......10.........107 (+12).........123,05............123
Some level 1 data for your work. They seem to use an integer, no rounding just cutting the decimals away.