Figure 2. Growth rates (percent) of sweetpotato in ten-year intervals from 1961-97 —China. Source: FAOSTAT, September 1998.

*Example: the growth rate for 1971-73 is the average annual growth rate for years 1961-63 to 1971-73; for 1975-77, the rate is the average annual growth rate for years 1965-67 to 1975-77, etc.