Total babies named Petro (all years): 160
| Year | Boys (count / rank / %) |
|---|---|
| 2015 | 5 / #13533 / 0.000% |
| 2009 | 5 / #13960 / 0.000% |
| 1993 | 5 / #9783 / 0.000% |
| 1988 | 5 / #8197 / 0.000% |
| 1986 | 6 / #6514 / 0.000% |
| 1976 | 11 / #3418 / 0.001% |
| 1975 | 7 / #4659 / 0.000% |
| 1974 | 7 / #4509 / 0.000% |
| 1972 | 7 / #4323 / 0.000% |
| 1971 | 11 / #3096 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1969 | 8 / #3512 / 0.000% |
| 1960 | 6 / #3957 / 0.000% |
| 1959 | 5 / #4424 / 0.000% |
| 1954 | 8 / #3114 / 0.000% |
| 1934 | 5 / #4089 / 0.000% |
| 1930 | 6 / #3900 / 0.001% |
| 1928 | 5 / #4595 / 0.000% |
| 1926 | 7 / #3628 / 0.001% |
| 1925 | 5 / #4738 / 0.000% |
| 1924 | 7 / #3772 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1923 | 7 / #3734 / 0.001% |
| 1921 | 6 / #4218 / 0.001% |
| 1920 | 10 / #2914 / 0.001% |
| 1918 | 6 / #4063 / 0.001% |