In this report, the assessment has been updated, stating it is likely that the global proportion of major (Category 3-5) tropical cyclone occurrences has increased over the last four decades and that this cannot be explained by internal variability alone; in other words, it likely is caused by human activities.
That said, the assessed level of confidence is low for long-term trends in the frequency of all-category tropical cyclones (https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_SPM.pdf). 16 The increase in the number of natural disasters since the 1970s may be due to improvement in the accuracy of statistics. Inui, T., "Shizen saigai to keizai seichō," Keizai Seminā, no. 706 (February/March 2019): pp. 22-5. 9  nothing."