Total babies named Ercia (all years): 80
| Year | Girls (count / rank / %) |
|---|---|
| 1989 | 8 / #8996 / 0.000% |
| 1988 | 9 / #7900 / 0.001% |
| 1987 | 7 / #9072 / 0.000% |
| 1986 | 6 / #9905 / 0.000% |
| 1985 | 11 / #6163 / 0.001% |
| 1984 | 8 / #7598 / 0.000% |
| 1982 | 8 / #7686 / 0.000% |
| 1980 | 10 / #6437 / 0.001% |
| 1979 | 5 / #10663 / 0.000% |
| 1975 | 8 / #6691 / 0.001% |