Table: population_data
Columns: year
b_tzow
schwante
vehlefanz
neu_vehlefanz
marwitz
b_renklau
eichst_dt

Question: What year has a Schwante smaller than 2.043, an Eichstädt smaller than 848, and a Bärenklau smaller than 1.262?
SQL: SELECT COUNT("year") FROM population_data WHERE "schwante" < 2.043 AND "eichst_dt" < 848 AND "b_renklau" < 1.262