251 G

252 Space flight, research, and support activities

1947

0

0

1948

0

0

1949

0

306

1950

0

343

1951

0

373

1952

6

388

1953

23

449

1954

34

506

1955

61

413

1956

109

386

1957

241

398

1958

254

452

1959

530

725

1960

593

1,983

1961

697

3,628

1962

882

6,062

1963

980

12,146

1964

1,458

19,621

1965

1,428

23,543

1966

1,665

26,852

1967

1,820

23,804

1968

1,900

19,995

1969

1,984

17,221

1970

1,781

14,415

1971

1,908

12,399

1972

1,980

11,904

1973

1,956

11,114

1974

3,171

9,248

1975

2,936

8,352

1976

2,732

8,818

1977

2,649

8,988

1978

2,668

8,660

1979

2,761

8,374

1980

2,698

8,696

1981

2,630

8,889

1982

2,674

9,308

1983

2,621

10,027

1984

2,843

9,945

1985

3,005

9,834

1986

3,228

9,818

1987

3,196

9,839

1988

3,325

11,522

1989

3,484

13,447

1990

3,603

14,755

1991

3,859

15,851

1992

4,257

15,305

1993

4,585

15,244

1994

4,403

14,091

1995

4,608

14,048

1996

4,392

13,882

1997

4,418

14,006

1998

5,663

13,610

1999

5,930

12,996

2000

6,353

12,714

2001

6,566

13,330