### Entry of parameters for population forecast

Municipal demands are calculated on a demand per capita basis. Therefore, the parameters that determine population development have to be entered first.

The calculation on future population development is based on the **reference year**. The figures for the reference years (currently up to 2001) are based on the 1994 census and were extended for the following years on the basis of DOS estimates (DOS=Department of Statistics). They are read from table STP_POPULATION.

In order to enter new figures for DOS estimates or to change existing ones, use the button ` DOS Population entry ` , which open a special data entry form.

Population growth assumes both a growth rate and a possible migration rate. The `growth rate` (expressed in %) typically is above zero.

Again, the button ` Keep for following years ` is greatly facilitating data entry. The same growth rate will be written to all following years. However, individual editing of any year is always possible.

The `migration rate` (expressed in absolute population numbers) may be zero in many cases, but it could be also a positive or a negative number.

When finally saving the projected municipal demands to STP, also the forecasted population figures (years 2005 to 2040) will be saved to table STP_POPULATION.

Use the top bar to navigate between the individual time steps.

__Note: __You can only proceed to the next form for entry of per-capita demands if you have at least entered the growth rate for year 2005.