| Year | Seasonal Ratio fi | Total | |||
| Spring | Summer | Autumn | Winter | ||
| 2006 | 59.5706% | 282.2752% | 18.9997% | 21.3392% | 382.1848% |
| 2007 | 70.6368% | 178.0376% | 60.1988% | 19.6431% | 328.5163% |
| 2008 | 60.0264% | 283.0554% | 125.7554% | 54.4979% | 523.3351% |
| 2009 | 96.4205% | 164.7990% | 40.1573% | 5.8027% | 307.1795% |
| 2010 | 96.2276% | 224.5436% | 54.7578% | 58.4999% | 434.0289% |
| 2011 | 72.5766% | 141.9566% | 155.7042% | 20.3267% | 390.5641% |
| 2012 | 70.7532% | 142.1502% | 79.5231% | 42.8041% | 335.2305% |
| 2013 | 113.0991% | 224.3529% | 108.8519% | 32.8773% | 479.1812% |
| 2014 | 40.8534% | 164.6823% | 148.0054% | 19.3062% | 372.8473% |
| 2015 | 55.4300% | 166.9102% | 85.4944% | 57.4757% | 365.3103% |
| 2016 | 110.7990% | 229.9188% | 72.2509% | 44.8437% | 457.8124% |
| 2017 | 139.2763% | 189.7881% | 86.0881% | 38.7943% | 453.9468% |
| 2018 | 86.9384% | 206.8495% | 53.1255% | 22.8726% | 369.7860% |
| Total | 82.5083% | 199.9477% | 83.7625% | 33.7756% | 399.9941% |
| Seasonal Adjustment Coefficient Fi | 82.5094% | 199.9506% | 83.7638% | 33.7762% | 400.0000% |