Calculate percentage of selected year

[Dunner2020]

Hi there,

I am trying to calculate the percentage of events that occurred at a location. I want to calculate the percentage in such a way that if I select the year from the slicer then it gives me the percentage of events that occurred in the selected year. If nothing is selected then it gives a percentage of all years. 

I am calculating measure something like that:

No of events = CALCULATE( DISTINCTCOUNT('Main Table'[OutageID]), FILTER('Main Table', 'Main Table'[Actual Interruption Start Time (NZST)] <= Today()))

Percentage =

Var _total_events = CALCULATE([No of events],ALLEXCEPT('Date','Date'[RY Year]))

Return

CALCULATE(([No of events] / _total_events)*100)

However, I got the following output

Could anyone help me where I made the mistake?

Sample file here

[CNENFRNL · Accepted solution]

# Events = DISTINCTCOUNT( 'Main Table'[OutageID] )

Pct = 
DIVIDE(
    [# Events],
    CALCULATE( [# Events], ALLEXCEPT( 'Main Table', 'Date'[RY] ) )
)