Table: us_gov_pay_scale
Columns: gs_grade
step_1
step_2
step_3
step_4
step_5
step_6
step_7
step_8
step_9
step_10

Question: Name the total number of step 6 for 11 gs grade
SQL: SELECT COUNT("step_6") FROM us_gov_pay_scale WHERE "gs_grade" = 11