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, | Year ended December 31, | Year ended December 31, | Year ended December 31, |
| --- | --- | --- | --- | --- | --- |
|  | 2017 | 2016 | 2015 | 2014 | 2013 |
| Available seat miles per fuel gallon consumed | 75.2 | 74.4 | 73.9 | 72.8 | 71.7 |
Question:
 What was Southwest's available seat miles per fuel gallon consumed for the year 2017 ?
Answer:
75.2