Table 11. Status of cases in which the lowest and highest bid amount is more than double by type of construction

Item	The number of disclosures of the lowest and highest bid amounts	Minimum and highest bid amount twice or more (%)
Restoration of trees	46	6(13.0)
Disease control and maintenance	70	29(41.4)
Maintenace	370	144(38.9)
Planting materials such as trees	29	4(13.8)
Resting facilities	57	6(10.5)
Amusement facilities	116	4(3.4)
Exercise facility	16	0(-)
Deck and other facilities	40	6(15.0)
Other purchases	15	1(6.7)
Landscape construction	1	1(100.0)
Total	760	201(26.4)