During which of the given years increase in number of hotels over the previous year was highest?

Increase in number of hotels over previous years = (number of hotels in previous year - number of hotels in current year). Increase in number of hotels over previous years are as follows: In 2004, 440 - 410 = 30 In 2005, 570 - 440 = 130 In 2006, 740 - 570 = 170 In 2008, 838 - 710 = 128 Hence, in 2006, increase in number of hotels over 2005 was highest.