Natural gas: Proved reserves	at end 1990	at end 2000	at end 2009		at end 2010
	Trillion	Trillion	Trillion	Trillion	Trillion
	cubic	cubic	cubic	cubic	cubic	Share	R/P
	metres	metres	metres	feet	metres	of total	ratio
US	4.8	5.0	7.7	272.5	7.7	4.1%	12.6
Canada	2.7	1.7	1.7	61.0	1.7	0.9%	10.8
Mexico	2.0	0.8	0.5	17.3	0.5	0.3%	8.9
Total North America	9.5	7.5	9.9	350.8	9.9	5.3%	12.0
Argentina	0.7	0.8	0.4	12.2	0.3	0.2%	8.6
Bolivia	0.1	0.7	0.7	9.9	0.3	0.2%	19.5
Brazil	0.1	0.2	0.4	14.7	0.4	0.2%	28.9
Colombia	0.1	0.1	0.1	4.4	0.1	0.1%	11.0
Peru	0.3	0.2	0.4	12.5	0.4	0.2%	48.8
Trinidad & Tobago	0.3	0.6	0.4	12.9	0.4	0.2%	8.6
Venezuela	3.4	4.2	5.1	192.7	5.5	2.9%	*
Other S. & Cent. America	0.2	0.1	0.1	2.3	0.1	w	22.4
Total S. & Cent. America	5.2	6.9	7.5	261.6	7.4	4.0%	45.9
Azerbaijan	n/a	1.2	1.3	44.9	1.3	0.7%	84.2
Denmark	0.1	0.1	0.1	1.8	0.1	w	6.4
Germany	0.2	0.2	0.1	2.4	0.1	w	6.5
Italy	0.3	0.2	0.1	3.0	0.1	w	11.1
Kazakhstan	n/a	1.8	1.9	65.2	1.8	1.0%	54.9
Netherlands	1.8	1.5	1.2	41.5	1.2	0.6%	16.6
Norway	1.7	1.3	2.0	72.1	2.0	1.1%	19.2
Poland	0.2	0.1	0.1	4.2	0.1	0.1%	29.2
Romania	0.1	0.3	0.6	21.0	0.6	0.3%	54.4
Russian Federation	n/a	42.3	44.4	1580.8	44.8	23.9%	76.0
Turkmenistan	n/a	2.6	8.0	283.6	8.0	4.3%	*
Ukraine	n/a	1.0	1.0	33.0	0.9	0.5%	50.4
United Kingdom	0.5	1.2	0.3	9.0	0.3	0.1%	4.5
Uzbekistan	n/a	1.7	1.6	55.1	1.6	0.8%	26.4
Other Europe & Eurasia	49.7	0.5	0.4	10.0	0.3	0.2%	28.3
Total Europe & Eurasia	54.5	55.9	63.0	2227.6	63.1	33.7%	60.5
Bahrain	0.2	0.1	0.2	7.7	0.2	0.1%	16.7
Iran	17.0	26.0	29.6	1045.7	29.6	15.8%	*
Iraq	3.1	3.1	3.2	111.9	3.2	1.7%	*
Kuwait	1.5	1.6	1.8	63.0	1.8	1.0%	*
Oman	0.3	0.9	0.7	24.4	0.7	0.4%	25.5
Qatar	4.6	14.4	25.3	894.2	25.3	13.5%	*
Saudi Arabia	5.2	6.3	7.9	283.1	8.0	4.3%	95.5
Syria	0.2	0.2	0.3	9.1	0.3	0.1%	33.2
United Arab Emirates	5.6	6.0	6.1	213.0	6.0	3.2%	*
Yemen	0.2	0.5	0.5	17.3	0.5	0.3%	78.3
Other Middle East	^	0.1	0.1	7.7	0.2	0.1%	62.1
Total Middle East	38.0	59.1	75.7	2677.0	75.8	40.5%	*
Algeria	3.3	4.5	4.5	159.1	4.5	2.4%	56.0
Egypt	0.4	1.4	2.2	78.0	2.2	1.2%	36.0
Libya	1.2	1.3	1.5	54.7	1.5	0.8%	98.0
Nigeria	2.8	4.1	5.3	186.9	5.3	2.8%	*
Other Africa	0.8	1.1	1.2	41.4	1.2	0.6%	65.7
Total Africa	8.6	12.5	14.7	520.1	14.7	7.9%	70.5
Australia	0.9	2.2	2.9	103.1	2.9	1.6%	58.0
Bangladesh	0.7	0.3	0.4	12.9	0.4	0.2%	18.3
Brunei	0.3	0.4	0.3	10.6	0.3	0.2%	24.7
China	1.0	1.4	2.8	99.2	2.8	1.5%	29.0
India	0.7	0.8	1.1	51.2	1.5	0.8%	28.5
Indonesia	2.9	2.7	3.0	108.4	3.1	1.6%	37.4
Malaysia	1.6	2.3	2.4	84.6	2.4	1.3%	36.1
Myanmar	0.3	0.3	0.3	11.8	0.3	0.2%	27.5
Pakistan	0.6	0.7	0.8	29.1	0.8	0.4%	20.9
Papua New Guinea	0.2	0.4	0.4	15.6	0.4	0.2%	*
Thailand	0.2	0.4	0.3	11.0	0.3	0.2%	8.6
Vietnam	^	0.2	0.7	21.8	0.6	0.3%	66.0
Other Asia Pacific	0.3	0.3	0.4	12.4	0.4	0.2%	20.4
Total Asia Pacific	9.9	12.3	15.8	571.8	16.2	8.7%	32.8
Total World	125.7	154.3	186.6	6608.9	187.1	100.0%	58.6
of which: OECD	15.7	14.7	17.0	603.8	17.1	9.1%	14.7
Non-OECD	109.9	139.6	169.6	6005.1	170.0	90.9%	83.6
European Union	3.4	3.8	2.5	86.2	2.4	1.3%	14.0
Former Soviet Union	49.3	50.8	58.4	2066.4	58.5	31.3%	77.2
* More than 100 years.
^ Less than 0.05
w Less than 0.05%.
n/a not available.
Notes: Proved reserves of oil - Generally taken to be those quantities that geological and engineering information indicates with reasonable certainty can be
recovered in the future from known reservoirs under existing economic and operating conditions.
Reserves-to-production (R/P) ratio - If the reserves remaining at the end of any year are divided by the  production in that year, the result is the length of time
that those remaining reserves would last if production were to continue at that rate.
Source of data - The estimates in this table have been compiled using a combination of primary official sources and third-party data from Cedigaz and the OPEC Secretariat.