CREATE TABLE table_19312274_2 (total VARCHAR(255), last_current_driver_s_ VARCHAR(255))
how many total where last/current driver(s) is narain karthikeyan ( 2010 )
    
SQL: SELECT COUNT(total) FROM table_19312274_2 WHERE last_current_driver_s_ = "Narain Karthikeyan ( 2010 )"