Puerto Rico is missing from the list of 'states' (it is an unincorporated territory of the United States).
For completeness, the following list adds additional missing state equivalents:
id code name
base.state_us_52 AS American Samoa
base.state_us_53 FM Federated States of Micronesia
base.state_us_54 GU Guam
base.state_us_55 MH Marshall Islands
base.state_us_56 MP Northern Mariana Islands
base.state_us_57 PW Palau
base.state_us_58 PR Puerto Rico
base.state_us_59 VI Virgin Islands
base.state_us_60 AA Armed Forces - Americas
base.state_us_61 AE Armed Forces - Europe
base.state_us_62 AP Armed Forces - Pacific
Puerto Rico is missing from the list of 'states' (it is an unincorporated territory of the United States).
For completeness, the following list adds additional missing state equivalents:
id code name
base.state_us_52 AS American Samoa
base.state_us_53 FM Federated States of Micronesia
base.state_us_54 GU Guam
base.state_us_55 MH Marshall Islands
base.state_us_56 MP Northern Mariana Islands
base.state_us_57 PW Palau
base.state_us_58 PR Puerto Rico
base.state_us_59 VI Virgin Islands
base.state_us_60 AA Armed Forces - Americas
base.state_us_61 AE Armed Forces - Europe
base.state_us_62 AP Armed Forces - Pacific