I assume both YTD numbers represent January 1 to June 30 of each year. I was a bit confused by the "foreign" and "domestic" distinction, but it seems to indicate location of manufacture.
The order is kind of goofy too. Here's the ranking by June 2017 sales. Tesla is still among the boutique marques, but within striking distance of Volvo and Mitsubishi.
GM 242,873Ford 227,166
Toyota 202,376
Chrysler 184,089
Nissan 143,328
Honda 139,793
Kia 56,143
Hyundai 54,507
Subaru 52,057
Mercedes 32,102
BMW 28,962
VW 27,377
Mazda 22,342
Audi 19,416
Mitsubishi 7,625
Volvo 7,303
Land Rover 5,760
Porsche 4,516
Mini 4,410
Tesla 3,900
Jaguar 2,946
Fiat 2,242
Maserati 1,235
Alfa Romeo 1,017
Smart 226
Ferrari 218
Bentley 218
Rolls Royce 111
Lamborghini 102
Maybach 0