Total babies named Io (all years): 216
| Year | Girls (count / rank / %) |
|---|---|
| 2023 | 10 / #9867 / 0.001% |
| 2022 | 18 / #6548 / 0.001% |
| 2021 | 15 / #7401 / 0.001% |
| 2020 | 11 / #9171 / 0.001% |
| 2019 | 6 / #14480 / 0.000% |
| 2018 | 11 / #9409 / 0.001% |
| 2017 | 7 / #13249 / 0.000% |
| 2016 | 16 / #7382 / 0.001% |
| 2015 | 5 / #17494 / 0.000% |
| 2014 | 12 / #9191 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 2013 | 12 / #9239 / 0.001% |
| 2012 | 12 / #9311 / 0.001% |
| 2011 | 9 / #11547 / 0.001% |
| 2010 | 6 / #15702 / 0.000% |
| 2009 | 8 / #12902 / 0.000% |
| 2008 | 5 / #18585 / 0.000% |
| 2007 | 5 / #18695 / 0.000% |
| 2006 | 5 / #18221 / 0.000% |
| 2004 | 7 / #13276 / 0.000% |
| 2000 | 5 / #15968 / 0.000% |