Plot of the natural log of new chemical entity (NCE) registration fees per million population to the natural log of US dollars of gross domestic product (GDP) per capita, with linear relationship among all countries except low-income outliers.

<p>Plot of the natural log of new chemical entity (NCE) registration fees per million population to the natural log of US dollars of gross domestic product (GDP) per capita, with linear relationship among all countries except low-income outliers.