Poll Results

Total votes: 4307

None: 272 (6.3%)
1: 389 (9.0%)
2: 540 (12.5%)
3: 595 (13.8%)
4: 521 (12.1%)
5: 445 (10.3%)
6: 389 (9.0%)
7: 274 (6.4%)
8: 226 (5.2%)
9: 134 (3.1%)
10: 150 (3.5%)
11-13: 212 (4.9%)
14-16: 92 (2.1%)
17-20: 32 (0.7%)
21-25: 3 (0.1%)
26-30: 4 (0.1%)
More than 30: 29 (0.7%)

I was inspired to ask ths question when I noticed that of the 5 keys on my keyring, I use 4 regularly. The fifth one... I don't even know what it's supposed to open.