How to add condition in a single selection filter pane?

[BoXiangWang]

Hello all,

I have a filter pane in which I use the expression below to only allow the users to select a year once at a time.

=aggr(only([Year]), [Year])

Now my data set contains some future date, for instance, 2075 which I do not want to show up in the filter. 

Is there any way, like set analysis, to allow me to adjust the filter without changing my data model?

I tried to add a set analysis within only(), but regarding the definition, it will only give me null().

Here is the screenshot of the filter pane:

[Nagaraju_KCS]

Try this 

=if(Year <= Year(Today()),Year)

[BoXiangWang]

I still want the user can only select one year at a time (single selection).

By adopting your suggestion, a single selection is not available. 

Is there any way to combine the conditional expression with the single selection?

[marcus_sommer]

You may try: =aggr(only({< [Year] = {"<=$(=year(today()))"}>} [Year]), [Year])