The first 4 of these have been in existence for a long time.

The game has been in existence since at least 1959.

The company has been in existence for over 100 years.

As of 2012, the show has been in existence for 60 years.

Remember either way the mind gets involved and is in existence always.

King's College has been in existence for over a century.

The public school system has been in existence since 1908.

There are still over 150 of his works known to be in existence.

It has been in existence from 1934 to the present.

It had already been in existence for about 450 years.

None of these are in existence at the present time.

It is almost ten years since they have been in existence.

Because this play is in existence, the war was won.

Be sure to find out how long the fund has been in existence.

This club is going to be in existence for a few years to come.

Most of what she found had been in existence less than a decade.

The camp and many others like it had been in existence for years.

If there's a program like that it must have been in existence the whole time.

The game and the cards must have been in existence long before.

Trees have been in existence on the Earth for 370 million years.

Also I remember this team was supposed to be in existence for only one more year.

The club has been in existence under several names since 1973.

It was in existence from 1962 to 1971 state elections.

It was in existence from 1902 to 1974 under that original name.

The seat has only been in existence since the 2002 election.