Based on the data provided, voluntary health expenditures in South Africa have exhibited a slight downward trend from 2013 to 2023. In 2023, the value stood at 55.65 Health Expenditure Units. Year-on-year variations show modest fluctuations, with the most recent years reflecting a consistent annual decrease of approximately 0.42%. Moreover, the compound annual growth rate (CAGR) metric shows an average annual decrease of about 0.44% over the last five years.

Future trends to watch for include:

The continuation of the gradual decline in health expenditure, as indicated by the forecasted CAGR of -0.35% over the next five years.
Potential policy changes or economic factors that could impact voluntary health expenditures.
Developments in healthcare technology and infrastructure, which may alter spending patterns.