Fixed-Income Investor Presentation

13 0.0% 0.5% 2009 1.5% 2.0% CUSTOMER GROWTH 1.0% 0.8% 0.9% 2010 2011 2012 0.8% 2013 0.9% 2014 1.8% 1.7% 1.7% 1.5% 1.5% 1.5% 1.4% 1.4% 1.3% 2015 2016 2017 2018 Net Customer Growth Rate 2019 2020 2021 2022 Q1 2023 1.1% 1.0% NW NaturalⓇ

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