How to back forecast data in SAS

[tyui]

I have a dataset which has  data for 5 cities of United States.Out of the 5 cities, 3 cities have data from 2008-2012 and 2 have from 2005 to 2012 at a monthly level. I do not want to consider data only from 2008-2012 but want to consider from 2005-2012. How can I back forecast the data for the 3 cities from 2005 -2007 at a monthly level.

[PGStats]

What kind of analysis/modelling do you have in mind for your data?  -  PG

[udo_sas]

Hello -

This example might be useful: http://support.sas.com/documentation/cdl/en/etsug/66840/HTML/default/viewer.htm#etsug_ssm_examples03...

Thanks,

Udo