The table indicates the number of participants in a wildlife survey in Britain from 2001 to 2009.
Overall, the number of adults in the survey accounted for the majority of participants except in 2009. Moreover, the total number of surveyees witnessed an upward trend throughout the period with the exception of a slight dip in 2007.
From 2001 to 2009, the total number of participants went up significantly from 48,000 to 540,000 individuals.
From 2001 to 2003, the number of adults taking part in the wildlife survey increased exponentially from 36,000 people to 212,000 people. Meanwhile, the figure for children tripled from 12,000 to 36,000 individuals. In 2005, a moderate rise of 120,000 people was recorded in the number of adults. However, there was an opposite trend in the number of children, decreasing to 32,000 individuals.
In the next two periods 2007 and 2009, the number of adult participants continued to drop gradually from 331,000 in 2007 to 270,000 in 2009. In 2007, the number of children also fell slightly to 31,000, but two years later, in 2009, this number skyrocketed to 270,000, matching the number of adults.