At the New York Times: "has grown fast" 7 Results "has been growing fast" 10 Results I'd take this one, it's more "active"
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"is growing" is better than "has been growing"Sorry to spoil your party, but this is just a matter of opinion. I think "has been growing" is better, and I would definitely have chosen that. I'm not comfortable with the present tense there with "in modern times", i.e., "during the course of past years extending into the present" and when a date in the 1800's is the