| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,020 | $8,112 |
| 2016 | $16,650 | $6,999 |
| 2017 | $16,900 | $10,845 |
| 2018 | $16,900 | $8,254 |
| 2019 | $17,300 | $9,526 |
| 2020 | $17,500 | $9,726 |
| 2021* | $17,762 | $9,930 |
| 2022* | $18,029 | $10,139 |
| 2023* | $18,299 | $10,352 |
| 2024* | $18,574 | $10,569 |
| 2025* | $18,852 | $10,791 |