Figure 3-2. IVM Days-in-the-Field
- June 1997: 36
- July 1997: 98
- August 1997: 1001
- September 1997: 3747
- October 1997: 8946
- November 1997: 15350
- December 1997: 22768
- January 1998: 30439
- February 1998: 37741
- March 1998: 46588
- April 1998: 57118
- May 1998: 69828
- June 1998: 83794
- July 1998: 99249
- August 1998: 115635
- September 1998: 132274
- October 1998: 150001
- November 1998: 167532
- December 1998: 186693
- January 1999: 206305
- February 1999: 224205
- March 1999: 244550
- April 1999: 265066
- May 1999: 286356
- June 1999: 306847
- July 1999: 327593
- August 1999: 348427
- September 1999: 368333
- October 1999: 386581
- November 1999: 405809
- December 1999: 425716
- January 2000: 445466
- February 2000: 463776
- March 2000: 483056
- April 2000: 501116
- May 2000: 519466
- June 2000: 536964
- July 2000: 554855