As usual, let me correct this statement: they mean “registered user names”, not "registered users", and this isn't equal to "active users".
Like i do usually, let us assume the numbers are however correct, this would mean that:
- 1.8 % of the active Worldwide Skypers are from Spain
- 12 % of the population of Spain are Skypers
- 18 % of the “active” population of Spain are Skypers (discounting people older than 65 years, and younger than 15 years)
- 26 % of Spanish internet users are Skypers