In my case, I've been participating since 2005, when we left full time work to travel 50% of the year.

She has participated in many national and international projects since 1997.

More than 400,000 university students and company managers around the world participated since 1980.

Women were encouraged to participate since the beginning of the movement.

All three groups have participated in the carnival each time since the beginning.

Have participated every official season since 1993 with the exception of 1998.

He has been participating since August 1989, an aide said.

He has participated in solo and group exhibitions since 1985.

She has participated in numerous group and solo shows since that time.

British workers have participated since 1982 and receive weekly benefits for up to a year.