What is the next number in sequence 18 9 11 14 7 9 12?

18 9 11 14 7 9 12

the series is like

18/2= 9

9+2=11

11+3=14

14/2=7

7+2=9

9+3=12

so next number will be.. 12/2=6

then 6+2=8

8+3=11