The citizenship variables from DemoStats 2019 show significant changes, for example total citizen count, nationally, decreased by 1.5 million from DemoStats 2018 to 2019 and total non-citizens increased by more than 1.8 million. Is there an explanation for this change?
To create the citizenship values in DemoStats 2018, the 2011 National Household Survey (NHS) was used as our starting values. The 2019 Version of DemoStats uses the 2016 census as the baseline data. The census vs NHS shows the same trend as our data; a decrease in the percentage of citizens and subsequently, an increase in non-citizens. This change should not be treated as real change. The majority of the difference between 2011 NHS and 2016 Census is largely due to known quality issues with the 2011 NHS.