| Month |
2018 |
2017 |
2016 |
2015 |
2014 |
| January |
1,346 |
1,391 |
1,612 |
1,479 |
1,575 |
| February |
1,338 |
1,308 |
1,591 |
1,243 |
1,358 |
| March |
1,518 |
1,764 |
2,058 |
2,080 |
1,828 |
| April |
1,710 |
1,537 |
2,005 |
2,200 |
2,028 |
| May |
1,817 |
1,880 |
1,964 |
2,033 |
1,900 |
| June |
1,663 |
1,749 |
2,057 |
2,044 |
1,856 |
| July |
1,507 |
1,453 |
1,578 |
1,800 |
1,749 |
| August |
1,572 |
1,698 |
1,852 |
1,693 |
1,789 |
| September |
1,439 |
1,485 |
1,882 |
1,806 |
1,788 |
| October |
1,627 |
1,553 |
1,712 |
1,793 |
1,809 |
| November |
1,456 |
1,406 |
1,662 |
1,614 |
1,466 |
| December |
1,173 |
1,184 |
1,681 |
1,641
| 1,554 |
| Total |
18,180 |
18,408 |
21,654 |
21,426 |
20,700 |
|