Total babies named Kollen (all years): 106
| Year | Boys (count / rank / %) |
|---|---|
| 2018 | 6 / #11549 / 0.000% |
| 2015 | 5 / #13174 / 0.000% |
| 2014 | 7 / #10244 / 0.000% |
| 2012 | 8 / #9346 / 0.000% |
| 2011 | 7 / #10284 / 0.000% |
| 2010 | 5 / #13413 / 0.000% |
| 2009 | 9 / #8710 / 0.000% |
| 2008 | 10 / #8039 / 0.000% |
| 2006 | 7 / #10183 / 0.000% |
| 2005 | 5 / #12514 / 0.000% |
| Year | Boys (count / rank / %) |
|---|---|
| 2003 | 6 / #10306 / 0.000% |
| 2001 | 13 / #5540 / 0.001% |
| 1999 | 8 / #7548 / 0.000% |
| 1998 | 5 / #10559 / 0.000% |
| 1992 | 5 / #9203 / 0.000% |