| 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|
| Jan | 7,533.5 | 7,099.2 | 6,083.8 | 6,749.4 |
| Feb | 7,231.9 | 7,263.4 | 6,097.1 | 6,967.4 |
| Mar | 7,322.9 | 6,174.9 | 6,803.0 | |
| Apr | 7,203.9 | 6,241.9 | 6,960.6 | |
| May | 7,520.0 | 6,230.8 | 6,984.4 | |
| Jun | 7,312.7 | 6,504.3 | 6,521.0 | |
| Jul | 7,372.0 | 6,724.4 | 6,696.3 | |
| Aug | 7,430.6 | 6,781.5 | 6,247.9 | |
| Sep | 7,372.8 | 6,899.3 | 6,061.6 | |
| Oct | 7,493.1 | 6,954.2 | 6,361.1 | |
| Nov | 7,326.7 | 6,783.8 | 6,356.1 | |
| Dec | 7,687.8 | 7,142.8 | 6,242.3 |
