The pie chart depicts the difference between the percentages of favorite transportation in London every 10 years from 1990 to 2010.
As can be seen from the chart that the most popular vehicle was underground railway in both years, the second was train and car. Besides, the transportations such as walk, bicycle and motorcycle were less popular than three above conveyances.
Underground railway accounted for about one third of total vehicles. Specifically, it accounted for 38% in 1990, after which it decreased to 35% in 2000 and then fell to 34% in 2010. Train and car accounted almost the same percentage. The former went down by 1% to 23% and the latter fell by 3% to 19% after 20 years from 1990. Walk changed almost insignificantly over the years, it accounted 8% in 1990 and rose by 1% to 9% in 2010. With starting point of 4%, the proportion of bicycle increased two-fold to 8% and accounted 10% in 2010. The percentage of motorcycle ranked last compared remaining vehicles, it grew from 4% to 5% during the time frame.