Conventions used in figures and tables The following conventions are used in the figures and tables for this report, including the annexes. '-' indicates that no respondents gave an answer in the category '0' indicates less than 0.5% (this does not apply when percentages are presented to one decimal point). 'n/a' indicates that the SCJS question was not applicable or not asked in that particular year. ' * ' indicates that data are not reported because the unweighted base is less than 50. Contents Executive Summary .