SELECT SUM("tied") FROM table_204_419
in how many matches have australia tied between 1990-1999 ?
CREATE TABLE table_204_419 (
    id number,
    "year" text,
    "tournament" text,
    "venue" text,
    "played" number,
    "won" number,
    "lost" number,
    "tied" number,
    "n/r" number,
    "result" text
)