| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,412 | $12,684 |
| 2016 | $19,926 | $12,971 |
| 2017 | $21,290 | $14,326 |
| 2018 | $21,290 | $13,833 |
| 2019 | $23,847 | $15,438 |
| 2020 | $24,359 | $15,950 |
| 2021* | $25,005 | $16,480 |
| 2022* | $25,667 | $17,027 |
| 2023* | $26,347 | $17,592 |
| 2024* | $27,046 | $18,176 |
| 2025* | $27,762 | $18,779 |
