During the late 1990s, national spending on social sciences and the humanities as a percentage of all research and development funds—including government, higher education, non-profit and corporate—varied from around 4% to 25%; in most European nations, it is about 15%.
重点词汇：humanities，corporate
重点短语：as a percentage of，
解析：该句子主语较长为“national spending on social sciences and the humanities as a percentage of all research and development funds”，其中介词短语“on social sciences and the humanities”为定语修饰“national spending”。分号并列省略句“it is about 15%”，介词短语“in most European nations”为状语。
翻译：在20世纪90年代后期，国家在社会科学和人文学科上的支出占所有研究和开发基金(包括政府、高等教育、非营利组织和企业)的比例从4%到25%不等;在大多数欧洲国家，这一比例约为15%。
