Table: race_results_27
Columns: year
date
driver
manufacturer
laps
miles_km
race_time
average_speed_mph

Question: Name the number of year for mark martin
SQL: SELECT COUNT("year") FROM race_results_27 WHERE "driver" = 'Mark Martin'

Question: Name the number of year for june 30
SQL: SELECT COUNT("year") FROM race_results_27 WHERE "date" = 'June 30'