The two pie charts illustrate the percentage of 
how 
American people travelling to a particular university in 2004 and 2009.
Rephrase
apply
Overall
, a glance at the graphs provided reveals Linking Words
all
 Correct word choice
that all
transportations
 experienced a major shift in Fix the agreement mistake
transportation
the usage except
 car method. Correct word order
usage except the
Train
 was the lowest Correct article usage
The train
popularity
 Change preposition
in popularity
between
 people over the decade.
In 2004, travelling by car accounted for the largest sector at just over half of the total (51%), Change preposition
among
following
 by bus at 33%. Walking and train Wrong verb form
followed
showing
 a relatively similar share at 4% and 3% respectively. Wrong verb form
show
Whereas
, bicycle share 9% of the total.
Linking Words
By contrast
, in 2009, Linking Words
bus
 method rose dramatically to make up 46%, overtaking car transport, which dropped sharply to only 28%. The number of individuals who are working increased by 2% to almost 6%, Correct article usage
the bus
while
 the Linking Words
used
 of Replace the word
use
train
 witnessed negligible growth by 1% to become 4%, the lowest method throughout the period. Fix the agreement mistake
trains
According to
 Linking Words
bicycle
 reaching Correct article usage
the bicycle
to 
16%.Change preposition
apply