Youtube api unknown part statistics

I am trying to get the part of statistics and for some reason i am getting error and i do like the docs say.

This is what i am sending:

https://www.googleapis.com/youtube/v3/search?key=AIzaSyBsobUXzJvjjuHZsMiv7SZAkzVcSgc8F2c&maxResults=5&part=id,snippet,statistics&q=test

without the statistics part this is working.

{"error": {"errors": [   {"domain": "youtube.part","reason": "unknownPart","message": "statistics","locationType": "parameter","location": "part"   }  ],"code": 400,"message": "statistics" }}