7.3   Comparison between integral and porthole containers
	Table 4 and Figure 27 show the trends in the total figures for containers in TEU. It can clearly be seen what a dominant role integral containers have come to play over porthole containers. The annual rate of growth of integral containers is on average approximately 13%, while porthole containers show a marked decline.   Year Insulated TEU Integral TEU Total TEU Source Increase in integrals per year 1978 53,260 52,291 105,551 Containerisation International World Container Census 1999 1982 72,184 110,710 182,894 Containerisation International World Container Census 1999 20.6% 1986 77,065 157,039 234,104 Containerisation International World Container Census 1999 9.1% 1990 71,505 282,265 353,770 Containerisation International World Container Census 1999 15.8% 1992 73,491 333,461 406,952 Cargoware International Dec. 1992 8.7% 1994 70,973 449,726 520,699 Containerisation International World Container Census 1999 16.1% 1995 71,888 519,684 591,572 Containerisation International Jan. 1996 15.6% 1996 64,187 566,657 630,844 Containerisation International World Container Census 1999 9.0% 1997 60,962 623,822 684,784 Containerisation International World Container Census 1999 10.1% 1998 57,477 696,419 753,896 Containerisation International World Container Census 1999 11.6% 2002 37,000 1,050,000 1,087,000 Containerisation International World Container Census 1999 10.8% forecast Table 4: Overall trends in refrigerated container quantities from 1986 through 1998   Figure 27: Overall trends in refrigerated container quantities from 1978 through 2004

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