Table:
|  | Options Outstanding |  | Options Vested and Exercisable |  |
| --- | --- | --- | --- | --- |
| Exercise Prices | Number Outstanding | Weighted Average Life (in Years) | Number Vested and Exercisable | Weighted Average Life (in Years) |
| $1.50 to $1.90 | 32,913 | 1.4 | 32,913 | 1.4 |
| 2.86 to 6.40 | 209,126 | 3.3 | 209,126 | 3.3 |
| 8.04 to 11.72 | 498,869 | 4.2 | 498,869 | 4.2 |
| 12.20 to 15.06 | 2,227,421 | 6.7 | 1,587,924 | 6.5 |
| 16.06 to 24.00 | 1,772,062 | 8.1 | 560,632 | 8.1 |
| 31.99 to 42.21 | 847,010 | 9.0 | 42,839 | 8.7 |
| 55.10 to 79.25 | 297,341 | 9.5 | 12,492 | 9.3 |
|  | 5,884,742 |  | 2,944,795 |  |
Paragraphs:
A summary of options outstanding and vested as of December 31, 2019 is as follows:
The total intrinsic value of options exercised during 2019, 2018, and 2017 was $318.5 million, $17.4 million, and $6.6 million, respectively.
The weighted average grant date fair value of options granted during the years ended December 31, 2019, 2018, and 2017, was $19.80, $9.07, and $6.44 per share, respectively. During the year ended December 31, 2019, 2,141,078 options vested. There were 2,939,947 options unvested as of December 31, 2019.
As of December 31, 2019, $30.3 million of total unrecognized compensation cost related to stock options was expected to be recognized over a weighted average period of approximately 2.5 years.
Question:
What are the weighted average grant date fair value of options granted during the years ended December 31, 2019, 2018, and 2017 respectively?
Answer: $19.80, $9.07, $6.44