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:
| Rank | Name | Height ft ( m ) | Floors | Year |
| --- | --- | --- | --- | --- |
| 1.0 | Wells Fargo Plaza | 296 (90) | 21.0 | 1972.0 |
| 2.0 | Chase Tower | 250 (76) | 20.0 | 1971.0 |
| 3.0 | Plaza Hotel | 239 (72) | 19.0 | 1930.0 |
| 4.0 | Kayser Building | 232 (70) | 20.0 | 1983.0 |
| 5.0 | Bassett Tower | 216 (66) | 15.0 | 1930.0 |
| 6.0 | El Paso Natural Gas Company Building | 208 (63) | 18.0 | 1954.0 |
| 7.0 | Camino Real Paso del Norte Hotel | 205 (62) | 17.0 | 1986.0 |
Question:
What is the lowest rank for El Paso Natural Gas Company Building?
Answer:
6.0