New variables

Variable	Description
var1 `integer` `standard` `mandatory` `unique` `multiple`	The first variable. Default: - 0
var2 `integer` `standard` `mandatory` `unique` `multiple`	The second variable. Default: - 0
var3 `integer` `standard` `mandatory` `unique` `multiple`	The third variable. Default: - 0
var4 `integer` `standard` `mandatory` `unique` `multiple`	The forth variable. Default: - 10
var5 `integer` `standard` `mandatory` `unique` `multiple`	The fifth variable. Default: - 10
var6 `integer` `standard` `mandatory` `unique` `multiple`	The sixth variable. Default: - 10
var7 `integer` `standard` `mandatory` `unique` `multiple`	The seventh variable. Default: - 0
var8 `integer` `standard` `mandatory` `unique` `multiple`	The eighth variable. Default: - 0