+my $usagemax = (max(map { ref $_ eq 'HASH' && sum(values %$_) } values %$canihas) // 1) / 100;
+
+my $usagepct = 1; # score multiplier for 0..100 result
+# normalise usage percentage to only include shown browsers
+$usagepct = 100 / featurescore({ # yes for every possible version
+ map { $_ => { map {$_ => 'y'} @{$versions{$_}} } } keys %versions
+});