9.     GOODWILL

Goodwill represents the excess of the purchase price over the fair value of net assets of businesses acquired. The carrying amount of goodwill was $721.8 million at December 31, 2021 and $653.2 million as of December 31, 2020. Goodwill increased for the year ended December 31, 2021 primarily due to acquisitions. The carrying amount of goodwill in foreign countries was $82.1 million as of December 31, 2021 and $81.4 million as of December 31, 2020.

The changes in the carrying amount of goodwill for the twelve months ended December 31, 2021 and 2020 were as follows:

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