Table 1 Case-finding and distribution of cases fulfilling McDonald diagnostic criteria by age group, sex and year of clinical onset

1978

1

1

1979

1

1

1980

1981

1

1

1982

1

1

1983

1

1

1984

1

1

1985

1

1

1986

1

1

1

1

1987

1

1

1

1

1988

1

1

1

1

1989

1990

1

2

1

4

1991

2

2

1

2

3

1992

1

1

1993

1

2

3

1994

1

1

1995

1

1

1996

2

1

2

1

1997

1

1

1

1

1998

1

1

1

1

2

1999

2

1

5

2

3

7

2000

1

1

2

1

1

4

2001

3

1

2

1

5

2002

1

2

1

3

1

2

6

2003

1

1

2

1

1

2

4

2004

1

1

1

1

1

3

2

6

2005

1

1

3

1

1

5

2006

1

2

3

6

2007

3

1

4

2008

2009

1

1

2010

1

1

2

2011

1

2

3

2012

2

3

5

Unknown

2

4

2

4

Total

1

10

10

8

24

8

34

8

2

1

2

4

28

84