Here's a short story:

The Dictionary of National Biography (DNB) is a standard work of reference on notable figures from British history, published from 1885. The updated Oxford Dictionary of National Biography (ODNB) was published on 23 September 2004 in 60 volumes and online, with 50,113 biographical articles covering 54,922 lives. 

Seeking to emulate national biographical collections published elsewhere in Europe, such as the "Allgemeine Deutsche Biographie" (1875), in 1882 the publisher George Smith (1824–1901), of Smith, Elder & Co., planned a universal dictionary that would include biographical entries on individuals from world history. He approached Leslie Stephen, then editor of the "Cornhill Magazine", owned by Smith, to become editor. Stephen persuaded Smith that the work should focus on subjects from the UK and its present and former colonies only. An early working title was the "Biographia Britannica", the name of an earlier eighteenth-century reference work. 

The first volume of the "Dictionary of National Biography" appeared on 1 January 1885. In May 1891 Leslie Stephen resigned and Sidney Lee, Stephen's assistant editor from the beginning of the project, succeeded him as editor. A dedicated team of sub-editors and researchers worked under Stephen and Lee, combining a variety of talents from veteran journalists to young scholars who cut their academic teeth on dictionary articles at a time when postgraduate historical research in British universities was still in its infancy. While much of the dictionary was written in-house, the "DNB" also relied on external contributors, who included several respected writers and scholars of the late nineteenth century. By 1900, more than 700 individuals had contributed to the work. Successive volumes appeared quarterly with complete punctuality until midsummer 1900, when the series closed with volume 63. The year of publication, the editor and the range of names in each volume is given below. (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: When was ODNB published?
Guess: 23 September 2004
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: How many volumes did it have?

60