are you using all of these averages?
Code:
Serb_CentralCroatia,24.83,30.66,16.70,9.10,15.19,1.43,0.55,0.29,0.36,0.46,0.31,0.04,0.08
Serb_NorthEastBosnia,25.49,30.63,16.30,8.40,14.66,1.78,0.54,0.29,0.95,0.55,0.34,0.06,0.01
Serb_CentralSerbia,24.59,29.55,17.43,8.40,16.48,1.44,0.53,0.23,0.72,0.30,0.31,0.00,0.02
Serb_Dalmatia,25.69,28.77,16.89,9.22,15.58,1.30,0.60,0.31,0.63,0.45,0.41,0.10,0.06
Serb_EastSerbia,23.79,29.45,16.91,8.77,16.35,2.00,0.59,0.10,1.00,0.71,0.32,0.00,0.00
Serb_Herzegovina,25.61,27.75,17.32,8.27,16.79,1.96,0.27,0.12,0.57,0.52,0.64,0.13,0.05
Serb_KosovoMetohija,25.02,26.73,17.99,8.89,17.80,1.57,0.22,0.17,0.54,0.52,0.25,0.14,0.16
Serb_BosanskaKrajina,24.77,30.01,16.92,9.30,14.88,1.51,0.72,0.37,0.42,0.37,0.58,0.01,0.13
Serb_Lika,25.15,29.65,16.89,8.49,15.88,1.59,0.45,0.18,0.68,0.56,0.31,0.13,0.04
Serb_SoutheastSerbia,23.75,28.51,17.01,9.38,16.94,2.13,0.43,0.34,0.61,0.40,0.26,0.15,0.11
Serb_SouthwestSerbia,26.38,28.39,16.97,9.07,15.59,1.51,0.47,0.18,0.57,0.31,0.21,0.20,0.14
Serb_Vojvodina,24.78,27.96,17.42,9.44,16.03,1.69,0.72,0.40,0.17,0.75,0.47,0.06,0.12
Serb_WestSerbia,25.67,30.22,16.56,8.28,15.69,1.17,0.61,0.37,0.61,0.39,0.35,0.00,0.08
Vlach_Serbia,22.77,27.08,19.09,10.03,16.82,1.28,0.34,1.25,0.36,0.49,0.47,0.00,0.17
Montenegro_Old_Herzegovina,25.98,27.45,17.63,8.87,15.99,1.31,0.38,0.43,0.48,1.15,0.23,0.00,0.13
Montenegro_SouthEast,22.76,25.94,19.54,9.88,17.90,1.79,0.60,0.25,0.67,0.28,0.30,0.06,0.03
there is an average for the northwestern half of Montenegro (Old herzegovina) (if you're not already using it).
https://en.wikipedia.org/wiki/Old_Herzegovina
you can split the western half of Serbia into "West" and "Southwest" ("Podrinje and Posavina" and "Raška" on this map:
https://en.wikipedia.org/wiki/Geogra...:Serbia022.png)
also the Serbs from Doboj region are part of the Northeast, not Krajina (they are very similar, but still)