CREATE TABLE table_45668 ("Macedonian population in Vojvodina" TEXT, "1961" FLOAT, "Number 1971" FLOAT, "1981" FLOAT, "1991" FLOAT, "2002" FLOAT)

What is the lowest 1971 number of the Macedonian population with a 2002 value greater than 133 and a 1991 value less than 171?
SELECT MIN("Number 1971") FROM table_45668 WHERE "2002" > '133' AND "1991" < '171'
SELECT MIN("Number 1971") FROM "table_45668" WHERE "1991" < '171' AND "2002" > '133'