Complex sentence: This situation remained until the complete dissolution of the Netherlands Antilles as a unified political entity in 2010, when Curaçao and Sint Maarten became autonomous constituent countries within the Kingdom like Aruba, while Bonaire, Sint Eustatius, and Saba became special municipalities of the Netherlands proper.
Split into simpler sentences: This situation remained until the complete dissolution of the Netherlands Antilles as a unified political entity in 2010. In that year Curaçao and Sint Maarten became autonomous constituent countries within the Kingdom (like Aruba); while Bonaire, Sint Eustatius, and Saba became special municipalities of the Netherlands proper.