I've created a table like:

Date          |     Qty

Jan, 2016   |    15 

Feb, 2016   |    10

Mar, 2016   |     20

Apr, 2016   |      10

May, 2016  |      20

I'm trying to create a dashboard with KPI and user filter by date (Month & Year).

When I changes the value of the filter, the value of the Qty is not changed

For example

When I select Jan,2016 I want to show 15

What is happen?

Thank you