CREATE TABLE table_name_62 (population_112008 INTEGER, population_per_square_km VARCHAR(255), population_112006 VARCHAR(255))
Name the least population 1.1.2008 with population per square km of 1.957 and population 1.1.2006 less than 12.67
    
SQL: SELECT MIN(population_112008) FROM table_name_62 WHERE population_per_square_km = 1.957 AND population_112006 < 12.67