Counting value recurrence by index

Hello

In my spreadsheet, I have the results of research.

In the column, B3:B75 the skills are listed.
In range C3:G75 it marks whether a particular company is seeking that skill (mostly through the index "Yes").

Now I need to know which skills are the most required (appearing the most) across all companies, which ones are less important and so on...

For example:

• Vision - 4
• Market Research & Analysis - 2, etc.

COUNTIF is not an option, as the occurrence does not consider the value itself but an index for it.

Any help or hint greatly appreciated.

/Marat