Question: How many different results of the population count in 2001 are there for the census division whose population in 1996 is 880859?
Schema: create table table_2134521_1 (pop__2001_ varchar, pop__1996_ varchar, PRIMARY KEY (pop__2001_))
SQL: select count(pop__2001_) from table_2134521_1 where pop__1996_ = 880859