The top five bookstop five books on the best seller liston the best seller list last year arelast year are shown below.

$1.$ Private London$1.$ Private London

$2.$ The Racketeer$2.$ The Racketeer

$3.$ Kiss The Dead$3.$ Kiss The Dead

$4.$ The Forgotten$4.$ The Forgotten

$5.$ Threat Vector$5.$ Threat Vector

Identify the level of measurement of the data set. Explain your reasoning.