Here's a short story:

Trondheim (), historically Kaupangen, Nidaros and Trondhjem, is a city and municipality in Sør-Trøndelag county, Norway. It has a population of 187,353 (January 1, 2016), and is the third most populous municipality in Norway, although the fourth largest urban area. It is the third largest city in the country, with a population (2013) of 169,972 inhabitants within the city borders. The city functions as the administrative centre of Sør-Trøndelag county. Trondheim lies on the south shore of Trondheim Fjord at the mouth of the River Nidelva. The city is dominated by the Norwegian University of Science and Technology (NTNU), the Foundation for Scientific and Industrial Research (SINTEF), St. Olavs University Hospital and other technology-oriented institutions. 

The settlement was founded in 997 as a trading post, and it served as the capital of Norway during the Viking Age until 1217. From 1152 to 1537, the city was the seat of the Catholic Archdiocese of Nidaros; since then, it has remained the seat of the Lutheran Diocese of Nidaros and the Nidaros Cathedral. It was incorporated in 1838. The current municipality dates from 1964, when Trondheim merged with Byneset, Leinstrand, Strinda and Tiller. 

The city was originally given the name by Olav Tryggvason. It was for a long time called "Nidaros" (), or "Niðaróss" in the Old Norse spelling. But it was also just called "kaupangr" ("city") or, more specifically, "kaupangr í Þróndheimi" ("the city in the district Þróndheimr", i.e. Trøndelag). In the late Middle Ages people started to call the city just "Þróndheimr". In the Dano-Norwegian period, during the years as a provincial town in the united kingdoms of Denmark-Norway, the city name was spelled "Trondhjem". (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: Where is Trondheim located?
Guess: Norway
Confidence: <appropriate level of confidence in this guess>

Question: WHen was it founded?
Guess: 997
Confidence: <appropriate level of confidence in this guess>

Question: Who originally gave it it's name?
Guess: Olav Tryggvason
Confidence: <appropriate level of confidence in this guess>

Question: What is it's populationi as of 2013?
Guess: 169,972
Confidence: <appropriate level of confidence in this guess>

Question: What was it notable for from 1152 to 1537?
Guess: the Catholic Archdiocese of Nidaros
Confidence: <appropriate level of confidence in this guess>

Question: What fjord south shore lies near it?
Guess: Trondheim Fjord
Confidence: <appropriate level of confidence in this guess>

Question: What did people start to call the city in the middle ages?
Guess: Þróndheimr
Confidence: <appropriate level of confidence in this guess>

Question: Is it known for it's educational institudes?
Guess: yes
Confidence: <appropriate level of confidence in this guess>

Question: Can you name one of them?
Guess: the Norwegian University of Science and Technology
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: When does the current municipality date to?

1964