Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_67959 ( "Year" real, "Population (Region total)" real, "Population (Stanthorpe)" real, "Population (Warwick)" real, "Population (Allora)" real, "Population (Glengallan)" real, "Population (Rosenthal)" real )

### Question ###
When were the years on which warwick had a population greater than 10,956 and allora had a population bigger than 2,439?

### Accurate SQL ###

SELECT SUM("Year") FROM table_67959 WHERE "Population (Warwick)" = '10,956' AND "Population (Allora)" > '2,439'