Table:
|  | Year Ended December 31, |  |  |  |  |
| --- | --- | --- | --- | --- | --- |
|  | 2019 | 2018 | 2017 | 2016 | 2015 |
| Total Bookings: | (unaudited; in millions) |  |  |  |  |
| Total revenue | $2,988.1 | $2,660.1 | $2,231.9 | $1,847.9 | $1,607.3 |
| Change in deferred revenue(1) | 180.5 | 163.2 | 214.4 | 163.5 | 165.9 |
| Net refunds | 233.4 | 192.6 | 170.0 | 141.9 | 137.8 |
| Other | (0.8) | (4.4) | 1.9 | 2.2 | 3.2 |
| Total bookings | $3,401.2 | $3,011.5 | $2,618.2 | $2,155.5 | $1,914.2 |
Paragraphs:
Reconciliation of Bookings
The following table reconciles total bookings to total revenue, its most directly comparable GAAP financial measure:
(1) Change in deferred revenue also includes the impact of realized gains or losses from the hedging of bookings in foreign currencies.
Question:
How many financial years had total bookings below $3,000 millions?
Answer: Objects satisfying the requirements:
2017 
 2016 
 2015
As a result, the answer is 3