Table 2.

Weighted average of watt level classification criteria

Survey item	Score	Percentage	Watt criteria
All the time	7	100%	500 W
Almost all the time	6	85.71%	500 W
Around 75% of the time	5	71.43%	400 W
Around 50% of the time	4	57.14%	300 W
Around 25% of the time	3	42.86%	200 W
Almost never	2	28.57%	100 W
Never	1	14.29%	100 W