Need a dimension on Map in Qliksense

[gaddeonline]

Dear All Experts,

Hope you are all doing great.

I am looking for a solution to have a Dimension on my map. The map in the below screenshot shows that the,

First layer - number of insurance policies that we insured in a particular state/territory. Once the state has been selected, the second layer shows up.

Second layer - number of insurance policies that we insured in a postcode(zip code). Once the postcode is selected,

I want to see the policies that are insured in that area. I have achieved up to second layer. I couldn't do the number of policies insured in that area. Can any one help me to achieve this.

Thanks and Regards

Mahesh Gadde