| 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | Total | Ratio (%) |
| Operation and use & maintenance | 29 | 30 | 27 | 19 | 25 | 20 | 16 | 22 | 22 | 13 | 223 | 37.2 |
| Pruning management | 2 | 3 | 3 | 3 | 1 | 2 | 2 | 2 | 1 | 1 | 20 | 3.4 |
| Fertilization management | 1 | 2 | 6 | 5 | 5 | 8 | 7 | 8 | 12 | 15 | 69 | 11.5 |
| Weed management | 2 | 1 | 2 | 2 | 1 | 4 | 2 | 2 | 3 | 1 | 20 | 3.4 |
| Irrigation and drainage management | | 0 | 1 | 0 | 0 | 2 | 5 | 1 | 1 | 3 | 13 | 2.2 |
| Wintering management | 3 | 1 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 3 | 10 | 1.6 |
| Pest management | 11 | 15 | 9 | 22 | 25 | 18 | 21 | 16 | 14 | 17 | 168 | 28.0 |
| Lawn management | 4 | 3 | 6 | 4 | 1 | 3 | 3 | 4 | 1 | 1 | 30 | 5.0 |
| Landscape facility management | 8 | 5 | 6 | 4 | 2 | 3 | 2 | 5 | 6 | 6 | 47 | 7.8 |
| Total | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 600 | 100.0 |