71 Annual Report 2021 Figures 5 and 6 below present the HHI values in other Member States. As observed in the Figure 5, in the case of household electricity consumer market, 8 out of 26 Member States recorded low concentration levels (HHI<2000) in 2020 and 18 presented high concentration levels. In 2020, with respect to household electricity consumer market, Member States recorded a drop in HHI levels compared to previous years. Norway, Sweden and Finland recorded the best performance. HHI values are less concentrated in non-household consumer markets. This may be due to the fact that non-household consumers are more active regarding their energy consumption and thus more open to new suppliers. As observed in Figure 6, in non-household electricity consumer market, 13 out of 24 Member States recorded low concentration levels in 2020. Romania, Norway, Great Britain and Italy had the best results. 6 ACER Annual Report on the Results of Monitoring the Internal Electricity and Natural Gas Markets in 2020 - Energy Retail Markets and Consumer Protection Volume Figure 5 - Herfindahl-Hirschman Index (HHI) of the household electricity consumer market in Member States in the period 2018 - 20206
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