| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,361 | $17,623 |
| 2016 | $23,111 | $17,790 |
| 2017 | $24,076 | $18,410 |
| 2018 | $24,076 | $18,655 |
| 2019 | $26,044 | $19,588 |
| 2020 | $26,020 | $19,564 |
| 2021* | $26,892 | $19,824 |
| 2022* | $27,793 | $20,088 |
| 2023* | $28,724 | $20,355 |
| 2024* | $29,686 | $20,626 |
| 2025* | $30,680 | $20,900 |