2 reasons.
Jamaica
1912
The 4-man bobsled has been around since the very first Winter Olympics in 1924, with the following two exceptions: In 1928 it was the 5-man bobsled. In 1960 the event was not held because the organizers didn't want to build a bobsled track.
The country that won the gold medal in the two-man bobsled event at the Sochi 2014 Winter Olympics is Russia.
The country that won the gold medal in the Two-women Bobsled event in the Sochi 2014 Winter Olympics was Canada.
The country that received the silver medal for the two-man bobsled event in the Sochi 2014 Winter Olympics is Switzerland.
bobsled
The winners of the gold medal for the two-man bobsled event in the Sochi 2014 Winter Olympics are Alexander Zubkov and Alexey Voevoda.
The winners of the gold medal for the Two-woman Bobsled event in the Sochi 2014 Winter Olympics are Kaillie Humphries and Heather Moyse.
The silver medal for the two-man bobsled event at the Sochi 2014 Winter Olympics was rewarded to Beat Hefti and Alex Baumann.
Elana Meyers and Lauryn Williams are the winners of the silver medal in the Two-woman Bobsled event in the Sochi 2014 Winter Olympics.
For the two-man bobsled event in the Sochi 2014 Winter Olympics, the two bronze medalists are Steven Holcomb and Steven Langton.