PHP downloads by version - you can grab it via an API https://packagist.org/packages/pact-foundation/pact-php/downloads.json

10.0.0-alpha1 / 17
10.0.0-alpha2 / 607
10.0.0-alpha3 / 4

You can also get all time

{
  "total": 698368,
  "monthly": 25440,
  "daily": 986
}

cc: @Tien Vo