rate of carbon rate of cell rate of change rate of charge rate of child rate of children rate of climb rate of community rate of compensation rate of completion rate of compliance rate of complications rate of consumption rate of contribution rate of convergence rate of conversion rate of cooling rate of corrosion rate of coverage rate of crime rate of crystallization rate of data rate of death rate of decay rate of decline rate of decomposition rate of decrease rate of deforestation rate of degradation rate of delivery rate of depression rate of descent rate of development rate of diffusion rate of disease rate of dissolution rate of divorce rate of drug rate of duty rate of early rate of economic rate of economic growth rate of employment rate of energy rate of evaporation rate of exchange rate of excise duty rate of expansion rate of extinction rate of failure rate of false rate of female rate of fire rate of flow rate of fluid rate of gas rate of global rate of growth rate of hair rate of heart rate of heat rate of heating rate of hydrolysis rate of implementation rate of improvement rate of incarceration rate of income rate of increase rate of infant mortality rate of infection rate of inflation rate of infusion rate of innovation rate of interest rate of investment rate of job rate of literacy rate of loss rate of maternal rate of men rate of metabolism rate of mortality rate of natural increase rate of net rate of new rate of obesity rate of occurrence rate of one rate of only rate of oxidation rate of oxygen rate of participation rate of patients rate of pay rate of payment rate of penetration rate of people rate of photosynthesis rate of polymerization