SELECT COUNT("Total Drivers") FROM table_23021 WHERE "Current March 20, 2010" = '2'
How many countries have 2 current drivers as of March 20, 2010?
CREATE TABLE table_23021 (
    "Country" text,
    "Total Drivers" real,
    "Champions" real,
    "Championships" real,
    "Current March 20, 2010" real,
    "First driver(s)" text,
    "Last/Current driver(s) March 20, 2010" text
)