Here's a list of all her adaptations, hope I didn't miss something.
before 1980s
Pride and Prejudice (1938)
Pride and Prejudice (1940)
Emma (1948)
Pride and Prejudice" (1952)
Pride and Prejudice" (1958)
Emma" (1960)
Persuasion" (1960-1961)
Pride and Prejudice" (1967)
Sense and Sensibility" (1971)
Persuasion" (1971)
Emma" (1972)

1980-2009
Pride and Prejudice" (1980)
Sense and Sensibility" (1981)
Mansfield Park" (1983)
Northanger Abbey (1987)
Persuasion (1995)
Pride and Prejudice (1995)
Sense and Sensibility (1995)
Emma (1996)
Emma (1996)
Mansfield Park (1999)
Pride & Prejudice (2005)
Persuasion (2007)
Northanger Abbey (2007)
Mansfield Park (2007)
Sense & Sensibility (2008)
Emma (2009)

I've seen all adaptations since the 1987 Northanger Abbey. I began watching one old version of Pride and Prejudice (don't remember which year), I totally disliked it, and didn't watch to the end...

I saw on adaptation of each book

Sense and Sensibility (1995)
Emma (1996)
Pride & Prejudice (2005)
Persuasion (2007)
Northanger Abbey (2007)
Mansfield Park (2007)

But I want so see more :)
Just didn't had time yet

Sense and Sensibility (1995)
Emma (1996)
Pride & Prejudice (2005)
Mansfield Park (2007)

I have the rest on my netflix list!

sense and sensibility 1995 and 2008
pride and prejudice 1995 and 2005
mansfield park 1999 and 2007
Emma 1995 and 1996
northanger abbey 2007
persuasion 2007

i would love to see more too

Don't know *lol*

haha...

I've watched :

Pride and Prejudice (1995)
Sense and Sensibility (1995)
Emma (1996)
Mansfield Park (1999)
Pride and Prejudice (2005)
Northanger Abbey (2007)
Persuasion (2007)

I still want to see other adaptations, though! :)

I've seen

Pride and Prejudice (1995 & 2005)
Sense and Sensibility (1995 & 2008)
Emma (1996)
Mansfield Park (2007)
Persuasion (2007)

...but I'm going to watch some more soon!