CREATE TABLE table_45367 ("Year" FLOAT, "Starts" FLOAT, "Wins" FLOAT, "Top 5" FLOAT, "Top 10" FLOAT, "Poles" FLOAT, "Avg. Start" FLOAT, "Avg. Finish" FLOAT, "Winnings" TEXT, "Position" TEXT, "Team ( s ) " TEXT)

Name the average Top 5 which has a Position of 52nd with a Year smaller than 2000?
SELECT AVG("Top 5") FROM table_45367 WHERE "Position" = '52nd' AND "Year" < '2000'
SELECT AVG("Top 5") FROM "table_45367" WHERE "Position" = '52nd' AND "Year" < '2000'