decreased
Regional governments have grown since the 1950s because many governments have devolved their function to increase efficiency.
How has advertising changed since the 1950s to the current era?
true
they have just changed
Results are improved
Well, in the 1950s the fashioned was polka dot dresses and long skirts with blouse.
John Huston
Since is used as a preposition to indicate a starting point in time or a reason for something. For example, "She has been in London since 2010" shows the starting point in time, while "Since you're here, let's go for a walk" indicates a reason for doing something.
the country Ireland has been around since 1923, since it became independent from Britain.
Ireland has had a President since 1938 and has been a fully independent republic since 1949
it has been doing it since the 1950s