CREATE TABLE table_14463 ("Urban area" TEXT, "Population 1.1.2009" TEXT, "Population 1.1.2008" FLOAT, "Population 1.1.2007" TEXT, "Population 1.1.2006" FLOAT, "Population per square km" FLOAT)

Name the total number of population per square km with population 1.12006 of 12.757
SELECT COUNT("Population per square km") FROM table_14463 WHERE "Population 1.1.2006" = '12.757'
SELECT COUNT("Population per square km") FROM "table_14463" WHERE "Population 1.1.2006" = '12.757'