Shakespeare wrote an average of 1.5 plays each year.
Shakespeare turned 49 in 1613, the year he retired. Plays he may have written that year include Henry VIII, The Two Noble Kinsmen and Cardenio. We can rarely be sure exactly which year a play was written in, so we cannot say for sure how many plays he wrote in a given year. On average he wrote two or three, but he was less prolific in his later career. He may have written or rather co-written two of the above-named plays in the same year.
Shakespeare wrote Othello in the year 1604
The First Folio, a collection of Shakespeare's plays, was first published in 1623.
No
Little is known about Shakespeare's life - in fact little is known of anyone of that period who wasn't a king or queen! All that is known of the start of Shakespeare's career is that his plays were being performed by 1592.
Shakespeare's writing career spanned the years 1590 to 1613, give or take a year either way.
Speculation shows it was never finished.
Unfortunately we do not have any documentation of all of the plays presented at the Globe Theatre during its 43-year history (1599-1642). Many of Shakespeare's plays, especially those written after the Globe was built, must have been performed there as well as many by other playwrights. John Fletcher, who replaced Shakespeare as house playwright in 1613, also muct have had many plays performed there.
They are between 398 and 419 years old (as of the year 2011)
Not that we know of. He appears to have totally retired in 1613.
We don't know what year he wrote it in, never mind which month. In any case, his total output of 38 plays in 23 years approximately suggests that he took more than a month to write a play.
Shakespeare's plays are being played constantly throughout the English-speaking world. Every day, one of his plays is being performed somewhere, and probably in more than one place. Right now (late 2010) on Broadway Al Pacino is playing in Merchant of Venice (last year it was Jude Law's Hamlet, now playing in LA). Professional theatre companies (and there is usually one of these in any city larger than 300,000) frequently include a Shakespeare play in their season. Many companies, like the Royal Shakespeare Company and the Stratford Shakespeare Festival specialise in putting on Shakespeare.