| Year | D(x) | Z(y) | C | D | Type | Coupling phase |
| 2006 | 0.2284 | 0.1248 | 0.9560 | 0.4227 | near-inharmonious recession | moderate coupling |
| 2007 | 0.2337 | 0.1557 | 0.9798 | 0.4454 | near-inharmonious recession | moderate coupling |
| 2008 | 0.2154 | 0.3021 | 0.9859 | 0.4966 | near-inharmonious recession | moderate coupling |
| 2009 | 0.2416 | 0.3712 | 0.9774 | 0.5356 | near-coordinated development | moderate coupling |
| 2010 | 0.2449 | 0.4549 | 0.9539 | 0.5601 | near-coordinated development | moderate coupling |
| 2011 | 0.2800 | 0.5310 | 0.9509 | 0.6014 | primary coordinated development | benign coupling |
| 2012 | 0.4059 | 0.5950 | 0.9820 | 0.6877 | primary coordinated development | benign coupling |
| 2013 | 0.5341 | 0.6464 | 0.9955 | 0.7592 | moderate coordinated development | benign coupling |
| 2014 | 0.3905 | 0.7223 | 0.9545 | 0.7067 | moderate coordinated development | benign coupling |
| 2015 | 0.3338 | 0.7781 | 0.9167 | 0.6848 | primary coordinated development | benign coupling |
| 2016 | 0.4525 | 0.7423 | 0.9701 | 0.7426 | moderate coordinated development | benign coupling |
| 2017 | 0.4949 | 0.7857 | 0.9739 | 0.7715 | moderate coordinated development | benign coupling |