| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,173 | $13,483 |
| 2016 | $20,461 | $13,324 |
| 2017 | $21,366 | $13,970 |
| 2018 | $21,366 | $14,717 |
| 2019 | $22,256 | $13,894 |
| 2020 | $23,004 | $14,642 |
| 2021* | $23,777 | $15,352 |
| 2022* | $24,576 | $16,097 |
| 2023* | $25,402 | $16,877 |
| 2024* | $26,255 | $17,696 |
| 2025* | $27,137 | $18,554 |
