Although the graphic covers a period from april'2001 to march'2002, the graphic shows a small drop in march'2002 in contrast with the increasing trend in the dollar value of monthly construction spending over the period from september'2001 to february'2002. 
An unusual drop is observed between october'2001 and november'2001. 
The dollar value of monthly construction spending drops to 874 billion dollars in march'2002 and reaches to 884.9 billion dollars in february'2002. 
The dollar value of this spending in march'2002 is nearly 1.1 times higher than that in september'2001. 
Slight increases are observed every month over the period from september'2001 to february'2002.