'DO' => array( // Dominican Republic.
        'DO-01' => __( 'Distrito Nacional', 'woocommerce' ),
        'DO-02' => __( 'Azua', 'woocommerce' ),
        'DO-03' => __( 'Baoruco', 'woocommerce' ),
        'DO-04' => __( 'Barahona', 'woocommerce' ),