There have been changes over time to the specifications of the indicators that make up the national Key Performance Indicators (nKPI) collection. As such, trends for some measures cannot be calculated or should be interpreted with caution (Table 1). For information on interpreting changes over time for the national Key Performance Indicators (nKPI) collection, including as a result of changes to indicator specifications and other factors, see Technical notes and Impact of COVID-19.
Table 2 presents trends for selected measures. Trends are calculated as a linear trend across all available data points. Data points for December periods are not shown in the table but are available in the Data tables accompanying this report. Of the 27 measures presented (noting some of the 22 indicators have, or are split into, more than one part), 11 have improved, 2 have had no (or limited) change, 6 have not improved, and trends for 8 cannot be calculated.