The chart shows the proportion of seats an airline was able to fill at three time points.

A glance at the bar chart provided reveals the percentage of occupancy seats in terms of four types of wright brothers airways in 2005, 2010 and 2015.

Overall

,

it is clear that

the rate of the premium

economy

class

was the highest compared to the other three,

whereas

the business

class

held the lowest number. The

economy

, premium

economy

and first

class

all experienced an upward trend,

while

the business showed a downward trend. In 2005, the

economy

class

and first

class

shared an equal number, at 80%, which remained stable in the next five years,

then

had a significant rise, peaking at 90% and 85% respectively in 2015. The figure for the premium

economy

was at 85% by 2005, before reaching the climax at 95% in the following years.

However

, with regards to the business

class

, the proportion accounted for 90% in the first year, until dropped dramatically to the bottom of 65%, almost reducing by 35% in 2010,

then

went up to 75% in 2015.