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:
| Class | Railway number(s) | Quantity rebuilt | Rebuild year(s) | Type |
| --- | --- | --- | --- | --- |
| B3 | 1"…148 | 51.0 | 1867–1883 | 1B n2 |
| D(rebuild) | 4"…48 | 16.0 | 1867–1874 | 1B n2 |
| B2(rebuild) | 7…128 | 16.0 | 1868–1882 | 1B n2 |
| B(rebuild) | 21…125 | 16.0 | 1869–1884 | 1B n2 |
| T2a | 36, 37 | 2.0 | 1872–1875 | 1B n2t |
| E(rebuild) | 88, 118 | 2.0 | 1873–1874 | 1′B n2 |
| T4a | 3"…123 | 11.0 | 1874–1886 | 2′B n2t |
| T(rebuild) | 87…129 | 7.0 | 1879–1887 | B n2t |
| Aa(rebuild) | 142, 179 | 2.0 | 1882 | 1B n2 |
Question:
What the least quantity having a T2A class?
Answer:
2.0