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:
| Profile | Bandwidth ( MHz ) | Number of carriers | Carrier bandwidth (kHz) | Power ( dBm ) | Max. downstream throughput ( Mbit/s ) |
| --- | --- | --- | --- | --- | --- |
| 8a | 8.832 | 2048.0 | 4.3125 | +17.5 | 50.0 |
| 8b | 8.832 | 2048.0 | 4.3125 | +20.5 | 50.0 |
| 8c | 8.5 | 1972.0 | 4.3125 | +11.5 | 50.0 |
| 8d | 8.832 | 2048.0 | 4.3125 | +14.5 | 50.0 |
| 12a | 12 | 2783.0 | 4.3125 | +14.5 | 68.0 |
| 12b | 12 | 2783.0 | 4.3125 | +14.5 | 68.0 |
| 17a | 17.664 | 4096.0 | 4.3125 | +14.5 | 100.0 |
Question:
What is the lowest number of carriers?
Answer:
1972.0