Backup XML vehicle sets

SOLUTION FOUND : Multiply Vehicle Sets. 

I have 1 vehicleset for all of my marked sheriff units, I then created a second vehicleset to have an unmarked unit with a detective ped. Now, every other vehicle that responds is a detective car (for example if your state patrol has one vehcleset bike cop and one vehicleset cvpi, they would alternate response) How do I make it so that the detective car only responds rarely? I already have about 15 cars in the first vehicleset (marked units) and have just the unmarked in the second vehicle set. Thanks!

hers my XML set up as I am describing above " I want the set in red to be a rare response.

<LosSantosCounty>
                <VehicleSet>
                <Vehicles>
                    <Vehicle livery="1">sheriff</Vehicle>
                    <Vehicle livery="1">sheriff</Vehicle>
                    <Vehicle livery="1">sheriff</Vehicle>
                    <Vehicle livery="1">sheriff</Vehicle>
                    <Vehicle livery="1">sheriff</Vehicle>
                    <Vehicle livery="1" extra_1="true" extra_2="true" extra_3="true">sheriff2</Vehicle>
                    <Vehicle livery="2" extra_1="true" extra_2="true" extra_3="true">sheriff2</Vehicle>
                    <Vehicle livery="3" extra_1="true" extra_2="true" extra_3="true">sheriff2</Vehicle>
                    <Vehicle livery="4" extra_1="true" extra_2="true" extra_3="true">sheriff2</Vehicle>
                    <Vehicle livery="2">sheriff2</Vehicle>
                    <Vehicle livery="5">police</Vehicle>
                    <Vehicle livery="6">police</Vehicle>
                    <Vehicle livery="7">police</Vehicle>
                    <Vehicle livery="1">police2</Vehicle>
                    <Vehicle livery="1">police2</Vehicle>
                    <Vehicle livery="1">police2</Vehicle>
                    <Vehicle>police4</Vehicle>
                    <Vehicle>police4</Vehicle>
                    <Vehicle>police4</Vehicle>
                    <Vehicle>police4</Vehicle>
                </Vehicles>
                <Peds>
                    <Ped chance="70">s_m_y_sheriff_01</Ped>
                    <Ped chance="30">s_f_y_sheriff_01</Ped>
                </Peds>
                <NumPeds min="1" max="2" />
            </VehicleSet>
                <VehicleSet>
                <Vehicles>
                    <Vehicle livery="1">fbi</Vehicle>
                </Vehicles>
                <Peds>
                    <Ped>s_m_m_ciasec_01</Ped>
                </Peds>
                <NumPeds min="1" max="1" />
            </VehicleSet>
        </LosSantosCounty>

Edited April 2, 201610 yr by ricearoni