Juan is in a management development program with Cisco, a worldwide leader in information technology, networking, and cyber security solutions. Cisco is a manufacturer known for its routers, switches, and wireless units, but it has seen an increase in revenues related to services such as cloud computing. It$$s no surprise that services account for $\_\_\_\_\_\_\_$ percent of the economic output of the United States.

$90$

$65$

$70$

$80$