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| Ion | No. of levels |
|---|
| I I | 229 |
| I II | 315 |
| I III | 116 |
| I IV | 61 |
| I V | 54 |
| I VI | 40 |
| I VII | 25 |
| I VIII | 36 |
| I IX | 2 |
| I X | 2 |
| I XI | 2 |
| I XII | 2 |
| I XIII | 2 |
| I XIV | 2 |
| I XV | 2 |
| I XVI | 2 |
| I XVII | 2 |
| I XVIII | 2 |
| I XIX | 2 |
| I XX | 2 |
| I XXI | 2 |
| I XXII | 2 |
| I XXIII | 2 |
| I XXIV | 2 |
| I XXV | 2 |
| I XXVI | 2 |
| I XXVII | 2 |
| I XXVIII | 2 |
| I XXIX | 2 |
| I XXX | 2 |
| I XXXI | 2 |
| I XXXII | 2 |
| I XXXIII | 2 |
| I XXXIV | 2 |
| I XXXV | 2 |
| I XXXVI | 2 |
| I XXXVII | 2 |
| I XXXVIII | 2 |
| I XXXIX | 2 |
| I XL | 2 |
| I XLI | 2 |
| I XLII | 2 |
| I XLIII | 2 |
| I XLIV | 2 |
| I XLV | 2 |
| I XLVI | 2 |
| I XLVII | 2 |
| I XLVIII | 2 |
| I XLIX | 2 |
| I L | 2 |
| I LI | 20 |
| I LII | 39 |
| I LIII | 10 |
| Total for I: | 1029 |