Table 5. Number of private sector establishments by age Professional, Scientific, and Technical Services Age Class March 1994 March 1995 March 1996 March 1997 March 1998 March 1999 Less than one year 61,824 68,161 71,905 79,043 82,944 83,580 1 year _ 49,803 54,425 57,351 62,340 66,879 2 years _ _ 43,122 47,332 49,339 54,628 3 years _ _ _ 38,417 41,903 44,097 4 years _ _ _ _ 34,501 38,145 5 years _ _ _ _ _ 31,752 6 years _ _ _ _ _ _ 7 years _ _ _ _ _ _ 8 years _ _ _ _ _ _ 9 years _ _ _ _ _ _ 10 years _ _ _ _ _ _ 11 years _ _ _ _ _ _ 12 years _ _ _ _ _ _ 13 years _ _ _ _ _ _ 14 years _ _ _ _ _ _ 15 years _ _ _ _ _ _ 16 years _ _ _ _ _ _ 17 years _ _ _ _ _ _ 18 years _ _ _ _ _ _ Born before March 1993 448,023 417,480 389,732 365,479 343,155 324,842 Total 509,847 535,444 559,184 587,622 614,182 643,923 Age Class March 2000 March 2001 March 2002 March 2003 March 2004 March 2005 Less than one year 82,242 77,249 80,757 73,797 72,163 74,453 1 year 65,677 63,934 66,732 67,487 63,104 62,972 2 years 56,434 55,163 55,844 56,785 55,818 55,017 3 years 47,603 48,833 47,676 48,784 49,769 50,123 4 years 39,186 41,872 42,604 42,204 43,805 44,757 5 years 34,245 34,977 37,135 38,094 38,186 40,017 6 years 28,913 30,884 31,475 33,597 34,683 34,973 7 years _ 26,336 28,231 28,680 30,892 32,142 8 years _ _ 24,147 26,224 26,527 28,763 9 years _ _ _ 22,407 24,563 24,836 10 years _ _ _ _ 21,059 23,091 11 years _ _ _ _ _ 19,892 12 years _ _ _ _ _ _ 13 years _ _ _ _ _ _ 14 years _ _ _ _ _ _ 15 years _ _ _ _ _ _ 16 years _ _ _ _ _ _ 17 years _ _ _ _ _ _ 18 years _ _ _ _ _ _ Born before March 1993 305,469 288,013 272,805 260,432 249,048 238,977 Total 659,769 667,261 687,406 698,491 709,617 730,013 Age Class March 2006 March 2007 March 2008 March 2009 March 2010 March 2011 Less than one year 84,740 84,437 82,370 77,191 72,189 78,821 1 year 67,055 73,212 71,821 69,600 62,066 60,937 2 years 55,926 58,310 62,894 61,373 58,215 54,478 3 years 49,292 49,658 51,478 53,908 52,842 52,148 4 years 45,846 44,250 44,657 44,813 47,117 48,031 5 years 40,858 41,931 40,354 39,669 39,804 43,140 6 years 36,940 37,270 38,663 35,953 35,660 36,692 7 years 32,550 34,150 34,427 35,027 32,788 32,986 8 years 30,139 29,950 31,712 31,273 32,077 30,458 9 years 27,080 27,935 28,006 28,965 28,830 29,983 10 years 23,425 25,164 26,235 25,682 26,758 26,941 11 years 21,814 21,795 23,831 24,280 23,804 25,147 12 years 18,979 20,507 20,611 22,007 22,643 22,468 13 years _ 17,815 19,376 19,182 20,467 21,388 14 years _ _ 16,953 18,148 17,879 19,441 15 years _ _ _ 15,981 17,169 17,073 16 years _ _ _ _ 15,050 16,413 17 years _ _ _ _ _ 14,392 18 years _ _ _ _ _ _ Born before March 1993 230,279 220,031 211,529 201,557 192,969 186,005 Total 764,923 786,415 804,917 804,609 798,327 816,942 Age Class March 2012 Less than one year 82,364 1 year 65,031 2 years 52,388 3 years 47,932 4 years 46,697 5 years 43,314 6 years 39,406 7 years 33,851 8 years 30,684 9 years 28,362 10 years 27,972 11 years 25,314 12 years 23,547 13 years 21,315 14 years 20,187 15 years 18,393 16 years 16,282 17 years 15,480 18 years 13,720 Born before March 1993 178,190 Total 830,429 NOTE: A '_' indicates that the data are not available and a 'N' indicates that the data do not meet BLS disclosure standards.