Table: superleague_drivers
Columns: country
total
champions
current
first_driver_s
last_current_driver_s

Question: what is the least current
SQL: SELECT MIN("current") FROM superleague_drivers

Question: how many total where last/current driver(s) is narain karthikeyan ( 2010 )
SQL: SELECT COUNT("total") FROM superleague_drivers WHERE "last_current_driver_s" = 'Narain Karthikeyan ( 2010 )'