CREATE TABLE "by_nationality" (
  "country" text,
  "total" real,
  "champions" real,
  "current" real,
  "first_driver_s" text,
  "last_current_driver_s" text
);

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

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