SELECT MIN("Championships") FROM table_23023
What in the minimum number of championships won by a nation?
CREATE TABLE table_23023 (
    "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
)