Finally, I've found the right website with right stats :) And I think they're updated every day!
This is the website (for other servers than EUNE, just change the "eune" part of the URL):
http://www.lolsummoners.com/stats/rankings/eune
Statistics for EUNE server for 16.10.2013
(Click to enlarge)
Player percentages
| Percentage of Challenger Players | 0.00847% |
| Percentage of Diamond Players | 1.52423% |
| Percentage of Platinum Players | 5.61318% |
| Percentage of Gold Players | 15.01% |
| Percentage of Silver Players | 42.23839% |
| Percentage of Bronze Players | 35.60573% |
Player counts
| Total Number of Active Players | 590,200 |
| Number of Challenger Players | 50 |
| Number of Diamond Players | 8,996 |
| Number of Platinum Players | 33,129 |
| Number of Gold Players | 88,589 |
| Number of Silver Players | 249,291 |
| Number of Bronze Players | 210,145 |
Source of all data: lolsummoners.com. KBH54N7DMENF
