The Following Graph Shows the Percent of Adult Hemodialysis Patients

The following graph shows the percent of adult hemodialysis patients who received adequate dialysis (urea reduction ratio 65% or greater) , by age, over the 2002-2007 period.
Which of the following statements about these data is NOT correct?

A) From 2002 to 2007, the overall percent of adult hemodialysis patients receiving adequate dialysis improved from about 86% to about 89%.
B) Comparing 2002 to 2007 data, improvements in the percent of adult hemodialysis patients receiving adequate dialysis were observed among all age groups.
C) In all years, adults age 18-44 and 45-64 were less likely than adults age 65 and older to receive adequate dialysis.
D) From 2002 to 2007, data for adults age 18 to 44 indicate a clear cyclical pattern.