| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,174 | $25,427 |
| 2016 | $36,952 | $27,004 |
| 2017 | $37,760 | $21,221 |
| 2018 | $37,760 | $20,927 |
| 2019 | $39,532 | $22,668 |
| 2020 | $40,670 | $23,806 |
| 2021* | $41,561 | $25,001 |
| 2022* | $42,471 | $26,256 |
| 2023* | $43,401 | $27,574 |
| 2024* | $44,351 | $28,958 |
| 2025* | $45,323 | $30,412 |