Following a slight rise between the year 1999 and the year 2000, the graphic shows a decreasing trend in the percentage of growth in Southwest's capacity over the period from the year 2000 to the year 2003. 
The percentage of growth in Southwest's capacity ranges from 13.16 to 3.91 percent. 
The percentage of growth in Southwest's capacity in the year 2000 is nearly 3.4 times higher than that in the year 2003.