Annex 1 Annex Box 1.2: Example of how to calculate the IDI value KOREA (REP.) Indicators Ideal value* 2010 ICT access a Fixed-telephone subscriptions per 100 inhabitants 60 59.2 b Mobile-cellular telephone subscriptions per 100 inhabitants 170 105.4 c International Internet bandwidth bit/s per Internet user** 280'377 11'878.4 d Percentage of households with a computer 100 82 e Percentage of households with Internet access at home 100 97 ICT use f Percentage of individuals using the Internet 100 84 g Fixed (wired)-broadband Internet subscriptions per 100 inhabitants 60 36.6 h Active mobile-broadband subscriptions per 100 inhabitants 100 91.0 ICT skills i Adult literary rate 100 97.9 j Secondary gross enrolment ratio 100 102.0 k Tertiary gross enrolment ratio 100 99.0 Normalized values ICT access Formula Weight z1 Fixed-telephone subscriptions per 100 inhabitants a/60 0.20 0.99 z2 Mobile-cellular telephone subscriptions per 100 inhabitants b/170 0.20 0.62 z3 International Internet bandwidth bit/s per Internet user log(c)/5.45 0.20 0.75 z4 Percentage of households with a computer d/100 0.20 0.82 z5 Percentage of households with Internet access at home e/100 0.20 0.97 ICT use z6 Percentage of individuals using the Internet f/100 0.33 0.84 z7 Fixed (wired)-broadband Internet subscriptions per 100 inhabitants g/60 0.33 0.61 z8 Active mobile-broadband subscriptions per 100 inhabitants h/100 0.33 0.91 ICT skills z9 Adult literary rate i/100 0.33 0.98 z10 Secondary gross enrolment ratio j/100 0.33 1.00 z11 Tertiary gross enrolment ratio k/100 0.33 0.99 Sub-indices IDI access sub-index (L) y1+y2+y3+y4+y5 0.40 0.82 y1 Fixed-telephone subscriptions per 100 inhabitants Z1*.20 0.20 y2 Mobile-cellular telephone subscriptions per 100 inhabitants Z2*.20 0.12 y3 International Internet bandwidth bit/s per Internet user Z3*.20 0.15 y4 Percentage of households with a computer Z4*.20 0.16 y5 Percentage of households with Internet access at home Z5*.20 0.19 IDI use sub-index (M) y6+y7+y8 0.40 0.79 y6 Percentage of individuals using the Internet Z6*.33 0.28 y7 Fixed (wired)-broadband Internet subscriptions per 100 inhabitants Z7*.33 0.20 y8 Active mobile-broadband subscriptions per 100 inhabitants Z8*.33 0.30 IDI skills sub-index (N) y9+y10+y11 0.20 0.99 y9 Adult literary rate Z9*.33 0.32 y10 Secondary gross enrolment ratio Z10*.33 0.33 y11 Tertiary gross enrolment ratio Z11*.33 0.33 IDI ICT Development Index ((L*.40)+(M*.40)+(N*.20))*10 8.40 Note: * The ideal value was computed by adding two standard deviations to the mean value of the indicator. ** To diminish the effect of the large number of outliers at the high end of the value scale, the data were first transformed to a loga-rithmic (log) scale. The ideal value of 280’377 bit/s per Internet user is equivalent to 5.45 if transformed to a log scale. Source: ITU. 140