I received 20 different results:

0,728312040506902

0,728349306449418

0,728386572391934

0,728461104276967

0,728796497759615

0,728833763702131

0,728889662615906

0,729374119868619

0,729784045236299

0,72998900792014

0,730697060827951

0,732020001787283

0,733529272459198

0,734442288050849

0,734796314504755

0,737237233739579

0,738168882302489

0,740684333422346

0,741224689588834

0,743292949398494

Using SQL Server 2012 and a rather large syscolumns table (4153 rows). I believe the answer is therefore incorrect.