Need help with Calculating a % from a table with duplicates

[prj102]

Need help to understand why this calulation is not working as expected.  The measure I'm using is below.  It's close but not perfect.  % of Assets is not calulating the percentage correctly and I've added the Expected Percentage column to show what I would expect to see.  The table / column I'm using (address) does contain duplicates.  I tried a formula with Distinct and it didn't seem to work as well.  I think I'm just looking for a calculation that does a distinct.

Measure

% of Assets = COUNTA('Table'[Address])/CALCULATE(COUNTA('Table'[Address]),ALLSELECTED())

Status	Count of Address	% of Assets	Expected Percentage
Assets Successfully Measured	3136	97.1138%	94.94%
Assets Unsuccessfully Measured	85	2.4655%	2.57%
Offline	18	0.1541%	0.54%
Processing	64	0.2665%	1.94%
Totals	3303	99.9999%	100.00%

[prj102 · Accepted solution]

So I figured it out.  

I created a new measure

% Unique Assets = DISTINCTCOUNT('Table'[Address])

and changed the value to show value as Percent of grand total.