Table 1. Distributions of Pro-Drop and Non-Pro-Drop Languages

Features # % Notes
Non-pro-drop (obligatory pronoun in subject position) 82 11.5 e.g., English, German, French
Pro-drop w/ rich verbal agreement conjugation (affixes on verb) 437 61.5 e.g., Spanish, Arabic
Pro-drop w/ discoursal context (optional pronouns in subject position) 61 8.6 e.g., Chinese, Japanese
Others (subject clitics on variable host, subject pronouns in different position, mixed) 131 18.4 = 32 + 67 + 32