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:
| Name | Tenure | Courtesy title | Court Rank | revenues |
| --- | --- | --- | --- | --- |
| Iwaki Yoshitaka ( 佐竹義隆 ? ) | 1623–1634 | Shuri-daiyu | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Nobutaka ( 岩城宣隆 ? ) | 1628-1656 | Tajima-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Shigetaka ( 岩城重隆 ? ) | 1656-1704 | Iyo-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Hidetaka ( 岩城秀隆 ? ) | 1685–1735 | Iyo-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takatsugu ( 岩城隆韶 ? ) | 1718-1745 | Tajima-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takyoshi ( 岩城隆恭 ? ) | 1745-1782 | Iyo-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takanori ( 岩城隆恕 ? ) | 1782-1817 | Iyo-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takahiro ( 岩城隆喜 ? ) | 1817-1853 | Iyo-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takanaga ( 岩城隆永 ? ) | 1854-1855 | Tajima-no-kami | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takanobu ( 岩城隆信 ? ) | 1855–1855 | - none - | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takamasa ( 岩城隆政 ? ) | 1855–1861 | Shuri-daiyu | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takakuni ( 岩城隆邦 ? ) | 1861-1869 | Ukyo-daiyu | Lower 5th (従五位下) | 20,000 koku |
| Iwaki Takaaki ( 岩城隆彰 ? ) | 1869-1871 | Viscount | 5th (従五位) | 20,000 -->18,000 koku |
Question:
What is the Revenues during Tenure 1854-1855?
Answer:
20,000 koku