Every year about 400 thousand young men are called up (in the recent years a little bit less). The number of 18-year-old men makes up from 1 million up to 1 million 200 thousand people. Try to divide this number by the number of 18-year-old men. What result did you get? And what do the newspapers write? You are right - they write that only 11-12% of young men are called up.