APNU = PNC + WPA, GAP, JP & NFA.
In the 2001 election the PNC got 165,866 votes. The other 4 parties together got 12,693 votes, ie 0.08% of the PNC votes.
2001 election was the last time these 5 parties contested separately.
Using that benchmark year, APNU = 1 + 0.08 =1.08. Put another way, 1 + 4 = 1.08. Bottom line, APNU is effectively PNC.