Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| LGA Name | Area (km 2 ) | Census 2006 population | Administrative capital | Postal Code |
| --- | --- | --- | --- | --- |
| Port Harcourt | 109.0 | 541115.0 | Port Harcourt | 500.0 |
| Obio-Akpor | 260.0 | 464789.0 | Rumuodumaya | 500.0 |
| Okrika | 222.0 | 222026.0 | Okrika | 500.0 |
| Ogu/Bolo | 89.0 | 74683.0 | Ogu | 500.0 |
| Eleme | 138.0 | 190884.0 | Eleme | 501.0 |
| Tai | 159.0 | 117797.0 | Sakpenwa | 501.0 |
| Gokana | 126.0 | 228828.0 | Kpor | 501.0 |
| Khana | 560.0 | 294217.0 | Bori | 502.0 |
| Oyigbo | 248.0 | 122687.0 | Afam | 502.0 |
| Opobo/Nkoro | 130.0 | 151511.0 | Opobo Town | 503.0 |
| Andoni | 233.0 | 211009.0 | Ngo | 503.0 |
| Bonny | 642.0 | 215358.0 | Bonny | 503.0 |
| Degema | 1011.0 | 249773.0 | Degema | 504.0 |
| Asari-Toru | 113.0 | 220100.0 | Buguma | 504.0 |
| Akuku-Toru | 1443.0 | 156006.0 | Abonnema | 504.0 |
| Abua/Odual | 704.0 | 282988.0 | Abua | 510.0 |
| Ahoada West | 403.0 | 249425.0 | Akinima | 510.0 |
| Ahoada East | 341.0 | 166747.0 | Ahoada | 510.0 |
| Ogba/Egbema/Ndoni | 969.0 | 284010.0 | Omuku | 510.0 |
| Emohua | 831.0 | 201901.0 | Emohua | 511.0 |
| Ikwerre | 655.0 | 189726.0 | Isiokpo | 511.0 |
| Etche | 805.0 | 249454.0 | Okehi | 512.0 |
Question:
How many areas (km 2) have 151511 as the census 2006 population?
Answer:
1.0