Fig. 1. The evolution of the world energy security pattern since 2000

Fig. 2. Performance of three main dimensions of energy system of energy-safe countries

Fig. 3. Scatter plots of energy supply safety index and energy use safety index for countries with relatively safe energy system in 2000 and 2018

Fig. 4. Energy security performance of former Soviet Union countries in European Union and Asian high-income countries

Fig. 5. Energy security performance of energy-rich countries

Fig. 6. Energy security performance of countries with energy system in transition

Fig. 7. Performance of countries with relatively dangerous or dangerous energy system

Fig. 8. Density distribution curves of global energy security index and its main three sub-indexes

Fig. 9. The evolution of energy security index and its three sub-indexes at different development stages