| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,719 | $17,947 |
| 2016 | $23,089 | $18,106 |
| 2017 | $23,580 | $18,336 |
| 2018 | $23,580 | $18,094 |
| 2019 | $24,518 | $18,598 |
| 2020 | $24,618 | $18,698 |
| 2021* | $25,019 | $18,864 |
| 2022* | $25,427 | $19,032 |
| 2023* | $25,842 | $19,202 |
| 2024* | $26,263 | $19,373 |
| 2025* | $26,691 | $19,545 |
