ITU‐T's Technical Reports and Specifications 59 Figure 1 – Word graph depicting the relative importance of the identified keywords Table 2 reflects a quantitative analysis of different keywords and the number of occurrences that these keywords had from the documents studied (as detailed in Annex 1). Table 2 – List of keywords, occurrences and relative percentage No Keyword Total Occurrences % Occurrence 1 Quality of life 44 6.1% 2 Development 16 2.2% 3 Services 10 1.4% 4 Buildings 17 2.3% 5 Health, safety and security 26 3.6% 6 Utilities 3 0.4% 7 Education 16 2.2% 8 Energy 17 2.3% 9 Water 16 2.2% 10 Electricity 3 0.4% 11 Modern 2 0.3% 12 ICT 27 3.7% 13 Technology 42 5.8% 14 Interconnected 1 0.1% 15 Information 24 3.3% 16 Communication 15 2.1% 17 Intelligent 16 2.2% 18 Integrate 22 3.0% 19 Systems 34 4.7% 20 Advanced 1 0.1% 21 Design 4 0.6% 22 Community 5 0.7% 23 Accessible 2 0.3% 24 People 36 5.0%