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:
|  | Year ended December 31, | Year ended December 31, |  |  |
| --- | --- | --- | --- | --- |
|  | 2018 | 2017 | Per ASM | Percent |
|  |  | As Recast | change | change |
| Salaries, wages, and benefits | 4.79¢ | 4.74¢ | 0.05¢ | 1.1 % |
| Fuel and oil | 2.89 | 2.65 | 0.24 | 9.1 |
| Maintenance materials and repairs | 0.69 | 0.65 | 0.04 | 6.2 |
| Landing fees and airport rentals | 0.83 | 0.84 | (0.01) | (1.2) |
| Depreciation and amortization | 0.75 | 0.79 | (0.04) | (5.1) |
| Other operating expenses | 1.79 | 1.86 | (0.07) | (3.8) |
| Total | 11.74¢ | 11.53¢ | 0.21¢ | 1.8 % |
Question:
how much was the percentage change in maintenance and repair costs for Southwest Airlines in 2018?
Answer:
6.2