| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,047 | $7,087 |
| 2016 | $18,564 | $11,948 |
| 2017 | $18,893 | $12,207 |
| 2018 | $18,893 | $12,323 |
| 2019 | $19,722 | $13,145 |
| 2020 | $20,420 | $13,843 |
| 2021* | $21,143 | $14,578 |
| 2022* | $21,891 | $15,352 |
| 2023* | $22,666 | $16,167 |
| 2024* | $23,469 | $17,026 |
| 2025* | $24,299 | $17,930 |