| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,082 | $13,776 |
| 2016 | $20,787 | $14,095 |
| 2017 | $21,677 | $14,023 |
| 2018 | $21,677 | $14,427 |
| 2019 | $22,689 | $13,846 |
| 2020 | $23,469 | $14,626 |
| 2021* | $24,293 | $14,965 |
| 2022* | $25,145 | $15,313 |
| 2023* | $26,028 | $15,668 |
| 2024* | $26,942 | $16,031 |
| 2025* | $27,887 | $16,403 |