Upon the original publication of this article, several errors were noted and listed in this erratum.
Upon the original publication, the following table footnotes were duplicated: Table 1., footnote a, on page 4.; Table 2., footnote a, on page 5. and; Table 3., footnote a, on page 5.
Upon the original publication, reference mark e and f in Table 1. were capital letters.
Upon the original publication, the row ‘Western country’ in Table 2. was indented.
These have now been corrected online. The publisher apologises for the error.